From 5b89c3198f5a6a6f6b2176ac810a7c325062fe91 Mon Sep 17 00:00:00 2001 From: Romain Perier Date: Fri, 28 Dec 2018 10:04:16 +0100 Subject: [PATCH] [rt] Update to 4.19.10-rt8 --- debian/changelog | 3 + ...M-at91-add-TCB-registers-definitions.patch | 2 +- ...d-zone-lock-while-freeing-pages-from.patch | 2 +- ...d-zone-lock-while-freeing-pages-from.patch | 2 +- ...ers-Add-a-new-driver-for-the-Atmel-A.patch | 2 +- ...ers-timer-atmel-tcb-add-clockevent-d.patch | 2 +- ...B-change-list_lock-to-raw_spinlock_t.patch | 2 +- ...drivers-atmel-pit-make-option-silent.patch | 2 +- ...ving-back-empty-slubs-to-IRQ-enabled.patch | 2 +- ...at91-Implement-clocksource-selection.patch | 2 +- ...onfigs-at91-use-new-TCB-timer-driver.patch | 2 +- .../0007-ARM-configs-at91-unselect-PIT.patch | 2 +- ...n-translation-section-permission-fau.patch | 2 +- ...mbus-include-header-for-get_irq_regs.patch | 2 +- ...xpedited-GP-parallelization-cleverne.patch | 2 +- ...intk-drop-the-logbuf_lock-more-often.patch | 2 +- ...wngrade-preempt_disable-d-region-to-.patch | 2 +- ...-replace-seqcount_t-with-a-seqlock_t.patch | 8 +- debian/patches-rt/add_migrate_disable.patch | 2 +- ...-a-locallock-instead-preempt_disable.patch | 2 +- .../arch-arm64-Add-lazy-preempt-support.patch | 2 +- .../arm-convert-boot-lock-to-raw.patch | 2 +- .../arm-disable-NEON-in-kernel-mode.patch | 2 +- .../arm-enable-highmem-for-rt.patch | 2 +- .../arm-highmem-flush-tlb-on-unmap.patch | 2 +- ...arm-include-definition-for-cpumask_t.patch | 2 +- ...probe-replace-patch_lock-to-raw-lock.patch | 2 +- .../patches-rt/arm-preempt-lazy-support.patch | 2 +- .../patches-rt/arm-unwind-use_raw_lock.patch | 2 +- ...e_layout-before-altenates-are-applie.patch | 2 +- ...-preemp_disable-in-addition-to-local.patch | 2 +- .../at91_dont_enable_disable_clock.patch | 2 +- ...e-blk_queue_usage_counter_release-in.patch | 2 +- ...k-mq-don-t-complete-requests-via-IPI.patch | 2 +- .../block-mq-drop-preempt-disable.patch | 2 +- .../patches-rt/block-mq-use-cpu_light.patch | 2 +- debian/patches-rt/block-use-cpu-chill.patch | 2 +- ...irqsave-in-cgroup_rstat_flush_locked.patch | 2 +- ...roups-use-simple-wait-in-css_release.patch | 2 +- ...source-tclib-allow-higher-clockrates.patch | 2 +- .../completion-use-simple-wait-queues.patch | 4 +- .../cond-resched-lock-rt-tweak.patch | 2 +- ...c-Protect-send_msg-with-a-local-lock.patch | 2 +- .../cpu-hotplug--Implement-CPU-pinning.patch | 2 +- ...rop-K8-s-driver-from-beeing-selected.patch | 2 +- .../cpumask-disable-offstack-on-rt.patch | 2 +- ...vert-callback_lock-to-raw_spinlock_t.patch | 2 +- ...-preempt-disabled-regions-more-algos.patch | 2 +- ...m-qi-simplify-CGR-allocation-freeing.patch | 2 +- ...d-a-lock-instead-preempt_disable-loc.patch | 2 +- ...ypto-limit-more-FPU-enabled-sections.patch | 2 +- ...-serialize-RT-percpu-scratch-buffer-.patch | 2 +- debian/patches-rt/debugobjects-rt.patch | 4 +- ...rq-remove-BUG_ON-irqs_disabled-check.patch | 2 +- ...am-Replace-bit-spinlocks-with-rtmute.patch | 2 +- .../drivers-tty-fix-omap-lock-crap.patch | 2 +- ...rivers-tty-pl011-irq-disable-madness.patch | 2 +- ...-t-disable-preemption-in-zcomp_strea.patch | 2 +- ...-zcomp_stream_get-smp_processor_id-u.patch | 2 +- .../drm-i915-disable-tracing-on-RT.patch | 2 +- ...M_I915_LOW_LEVEL_TRACEPOINTS-with-NO.patch | 26 +++ ...rq()_in_intel_pipe_update_startend().patch | 2 +- ...disableenable_rt()_where_recommended.patch | 2 +- debian/patches-rt/efi-Allow-efi-runtime.patch | 2 +- .../efi-Disable-runtime-services-on-RT.patch | 2 +- .../patches-rt/epoll-use-get-cpu-light.patch | 2 +- .../fs-aio-simple-simple-work.patch | 2 +- ...-back-explicit-INIT_HLIST_BL_HEAD-in.patch | 2 +- ...e-preemption-on-i_dir_seq-s-write-si.patch | 2 +- ...cache-use-cpu-chill-in-trylock-loops.patch | 2 +- ...use-swait_queue-instead-of-waitqueue.patch | 2 +- .../fs-jbd-replace-bh_state-lock.patch | 2 +- ...-nfs-turn-rmdir_sem-into-a-semaphore.patch | 2 +- .../fs-replace-bh_uptodate_lock-for-rt.patch | 2 +- ...lize-cookie-hash-table-raw-spinlocks.patch | 2 +- .../ftrace-Fix-trace-header-alignment.patch | 2 +- .../ftrace-migrate-disable-tracing.patch | 2 +- ...k-unlock-symetry-versus-pi_lock-and-.patch | 2 +- debian/patches-rt/futex-requeue-pi-fix.patch | 2 +- ...-migrate_disable-enable-in-different.patch | 2 +- .../genirq-disable-irqpoll-on-rt.patch | 2 +- ...voke-the-affinity-callback-via-a-wor.patch | 2 +- .../patches-rt/genirq-force-threading.patch | 2 +- ...-irq_set_irqchip_state-documentation.patch | 2 +- ...duct-tape-RT-rwlock-usage-for-non-RT.patch | 2 +- .../hotplug-light-get-online-cpus.patch | 2 +- ...-schedule_work-call-to-helper-thread.patch | 2 +- ...-by-default-into-the-softirq-context.patch | 2 +- ...ate-hrtimer_init-hrtimer_init_sleepe.patch | 2 +- ...te-change-before-hrtimer_cancel-in-d.patch | 2 +- .../hrtimers-prepare-full-preemption.patch | 2 +- ...irq-processing-in-irq-thread-context.patch | 2 +- ...ts-Move-pending-table-allocation-to-.patch | 2 +- ...-push_most_work_into_softirq_context.patch | 2 +- debian/patches-rt/jump-label-rt.patch | 2 +- .../kconfig-disable-a-few-options-rt.patch | 2 +- .../patches-rt/kconfig-preempt-rt-full.patch | 2 +- ...n-t-try-to-print-from-IRQ-NMI-region.patch | 2 +- ...vide-a-pointer-to-the-valid-CPU-mask.patch | 2 +- ...e-stack-kprobe-clean-up-to-__put_tas.patch | 2 +- debian/patches-rt/kgb-serial-hackaround.patch | 2 +- ...-kmemleak_lock-to-raw-spinlock-on-RT.patch | 160 ++++++++++++++++++ ...-convert-worker-lock-to-raw-spinlock.patch | 2 +- ...ds-trigger-disable-CPU-trigger-on-RT.patch | 2 +- .../list_bl-fixup-bogus-lockdep-warning.patch | 2 +- ..._bl.h-make-list-head-locking-RT-safe.patch | 2 +- ...provide-get-put-_locked_ptr-variants.patch | 2 +- debian/patches-rt/localversion.patch | 4 +- .../lockdep-disable-self-test.patch | 2 +- .../lockdep-no-softirq-accounting-on-rt.patch | 2 +- ...-fix-warnings-due-to-missing-PREEMPT.patch | 2 +- ...ardirq-context-test-for-raw-spinlock.patch | 2 +- ...eck-for-__LINUX_SPINLOCK_TYPES_H-on-.patch | 2 +- ...ure-Do-NOT-include-rwlock.h-directly.patch | 2 +- ...-fix-deadlock-in-device-mapper-block.patch | 2 +- ...re-init-the-wait_lock-in-rt_mutex_in.patch | 2 +- debian/patches-rt/md-disable-bcache.patch | 2 +- .../md-raid5-percpu-handling-rt-aware.patch | 2 +- .../mips-disable-highmem-on-rt.patch | 2 +- .../mm-convert-swap-to-percpu-locked.patch | 4 +- debian/patches-rt/mm-disable-sloub-rt.patch | 2 +- debian/patches-rt/mm-enable-slub.patch | 2 +- ...ake-quarantine_lock-a-raw_spinlock_t.patch | 2 +- .../patches-rt/mm-make-vmstat-rt-aware.patch | 2 +- ...n-t-call-schedule_work_on-in-preempt.patch | 2 +- .../mm-memcontrol-do_not_disable_irq.patch | 2 +- ...page_alloc-rt-friendly-per-cpu-pages.patch | 6 +- ...m-perform-lru_add_drain_all-remotely.patch | 2 +- .../mm-protect-activate-switch-mm.patch | 2 +- .../mm-rt-kmap-atomic-scheduling.patch | 2 +- ...-scatterlist-dont-disable-irqs-on-RT.patch | 2 +- .../mm-vmalloc-use-get-cpu-light.patch | 2 +- ...oc_copy_with_get_cpu_var_and_locking.patch | 2 +- debian/patches-rt/mutex-no-spin-on-rt.patch | 2 +- ...schedule_irqoff-disable-interrupts-o.patch | 6 +- ...Qdisc-use-a-seqlock-instead-seqcount.patch | 2 +- .../net-add-a-lock-around-icmp_sk.patch | 2 +- ...-missing-serialization-in-ip_send_un.patch | 2 +- ...al-irq-disable-alloc-atomic-headache.patch | 2 +- ...-users-of-napi_alloc_cache-against-r.patch | 2 +- ...-use-local_bh_disable-in-netif_rx_ni.patch | 4 +- ...ake-qdisc-s-busylock-in-__dev_xmit_s.patch | 4 +- ...ble-xt-write-recseq-begin-rt-fallout.patch | 2 +- .../net-make-devnet_rename_seq-a-mutex.patch | 2 +- ...recursion-to-per-task-variable-on-RT.patch | 10 +- ...y-to-delegate-processing-a-softirq-t.patch | 4 +- ...activate_many-use-msleep-1-instead-o.patch | 2 +- debian/patches-rt/net-use-cpu-chill.patch | 2 +- .../net_disable_NET_RX_BUSY_POLL.patch | 2 +- ...-phandle-cache-outside-of-the-devtre.patch | 2 +- debian/patches-rt/oleg-signal-rt-fix.patch | 2 +- .../panic-disable-random-on-rt.patch | 2 +- ...ce-rcu-bh-qs-where-safe-from-softirq.patch | 2 +- ...ec-Don-t-use-completion-s-wait-queue.patch | 2 +- ...de-irqflags.h-for-raw_local_irq_save.patch | 2 +- ...elay-memory-deallocation-until-cpu_d.patch | 74 ++++++++ .../patches-rt/peter_zijlstra-frob-rcu.patch | 2 +- .../patches-rt/peterz-percpu-rwsem-rt.patch | 2 +- .../patches-rt/pid.h-include-atomic.h.patch | 2 +- ...Use-raw-spinlock-for-RT-compatibilit.patch | 2 +- ...timers-thread-posix-cpu-timers-on-rt.patch | 2 +- .../power-disable-highmem-on-rt.patch | 2 +- .../power-use-generic-rwsem-on-rt.patch | 2 +- ...ble-in-kernel-MPIC-emulation-for-PRE.patch | 2 +- .../powerpc-preempt-lazy-support.patch | 2 +- debian/patches-rt/preempt-lazy-support.patch | 2 +- .../patches-rt/preempt-nort-rt-variants.patch | 2 +- ...27-boot-param-to-help-with-debugging.patch | 2 +- debian/patches-rt/printk-kill.patch | 2 +- debian/patches-rt/printk-rt-aware.patch | 2 +- ...ace-fix-ptrace-vs-tasklist_lock-race.patch | 2 +- .../radix-tree-use-local-locks.patch | 2 +- ...dom-avoid-preempt_disable-ed-section.patch | 2 +- .../random-make-it-work-on-rt.patch | 2 +- ...nate-softirq-processing-from-rcutree.patch | 2 +- .../rcu-disable-rcu-fast-no-hz-on-rt.patch | 2 +- ..._normal_after_boot-by-default-for-RT.patch | 2 +- .../rcu-make-RCU_BOOST-default-on-RT.patch | 2 +- ...merge-rcu-bh-into-rcu-preempt-for-rt.patch | 2 +- ...l-arm-coredump-fails-for-cpu-3e-3d-4.patch | 2 +- ...ease-the-nr-of-migratory-tasks-when-.patch | 2 +- .../patches-rt/rt-introduce-cpu-chill.patch | 2 +- debian/patches-rt/rt-local-irq-lock.patch | 2 +- .../patches-rt/rt-preempt-base-config.patch | 2 +- debian/patches-rt/rt-serial-warn-fix.patch | 2 +- .../rtmutex-Make-lock_killable-work.patch | 2 +- ...tex-Provide-rt_mutex_slowlock_locked.patch | 2 +- ...utex-implementation-based-on-rtmutex.patch | 2 +- ...lock-implementation-based-on-rtmutex.patch | 2 +- ...wsem-implementation-based-on-rtmutex.patch | 2 +- ...tex-add-sleeping-lock-implementation.patch | 2 +- ...utex-add-ww_mutex-addon-for-mutex-rt.patch | 2 +- ...mutex-annotate-sleeping-lock-context.patch | 2 +- .../rtmutex-avoid-include-hell.patch | 2 +- ...ockdep-less-version-of-rt_mutex-s-lo.patch | 2 +- .../patches-rt/rtmutex-futex-prepare-rt.patch | 2 +- debian/patches-rt/rtmutex-lock-killable.patch | 2 +- .../rtmutex-trylock-is-okay-on-RT.patch | 2 +- .../rtmutex-wire-up-RT-s-locking.patch | 2 +- .../patches-rt/rtmutex_dont_include_rcu.patch | 2 +- ...ed-user-tasks-to-be-awakened-to-the-.patch | 2 +- debian/patches-rt/sched-delay-put-task.patch | 2 +- .../sched-disable-rt-group-sched-on-rt.patch | 2 +- .../patches-rt/sched-disable-ttwu-queue.patch | 2 +- .../patches-rt/sched-limit-nr-migrate.patch | 2 +- ...might-sleep-do-not-account-rcu-depth.patch | 2 +- ...sable-Add-export_symbol_gpl-for-__mi.patch | 2 +- ...sable-fallback-to-preempt_disable-in.patch | 2 +- debian/patches-rt/sched-mmdrop-delayed.patch | 2 +- debian/patches-rt/sched-rt-mutex-wakeup.patch | 2 +- ...Only-wake-up-idle-workers-if-not-blo.patch | 2 +- debian/patches-rt/scsi-fcoe-rt-aware.patch | 2 +- .../seqlock-prevent-rt-starvation.patch | 6 +- debian/patches-rt/series | 3 + .../signal-revert-ptrace-preempt-magic.patch | 2 +- ...t-tasks-to-cache-one-sigqueue-struct.patch | 2 +- debian/patches-rt/skbufhead-raw-lock.patch | 18 +- .../slub-disable-SLUB_CPU_PARTIAL.patch | 2 +- .../slub-enable-irqs-for-no-wait.patch | 2 +- ...oftirq-disable-softirq-stacks-for-rt.patch | 2 +- .../patches-rt/softirq-preempt-fix-3-re.patch | 14 +- debian/patches-rt/softirq-split-locks.patch | 2 +- ...plit-timer-softirqs-out-of-ksoftirqd.patch | 2 +- .../spinlock-types-separate-raw.patch | 2 +- ...e-of-local-lock-in-multi_cpu-decompr.patch | 2 +- ...place-local_irqsave-with-a-locallock.patch | 2 +- ...-use-cpu_online-instead-custom-check.patch | 2 +- ...vc_xprt_do_enqueue-use-get_cpu_light.patch | 2 +- debian/patches-rt/sysfs-realtime-entry.patch | 2 +- ...-from-going-into-infinite-spin-in-rt.patch | 2 +- ...rmal-Defer-thermal-wakups-to-threads.patch | 2 +- ...id-schedule_work-with-interrupts-dis.patch | 2 +- .../timekeeping-split-jiffies-lock.patch | 2 +- .../timers-prepare-for-full-preemption.patch | 2 +- .../tpm_tis-fix-stall-after-iowrite-s.patch | 2 +- ...0-don-t-take-the-trylock-during-oops.patch | 2 +- ...al-pl011-warning-about-uninitialized.patch | 2 +- ...ove-preemption-disabling-in-netif_rx.patch | 6 +- ...o-not-disable-interrupts-in-giveback.patch | 2 +- .../patches-rt/wait.h-include-atomic.h.patch | 2 +- ...t-deferral-of-watchdogd-wakeup-on-RT.patch | 2 +- ...rk-around-irqsafe-timer-optimization.patch | 2 +- ...mple-Simple-work-queue-implemenation.patch | 2 +- ...-a-shit-statement-in-SWORK_EVENT_PEN.patch | 2 +- .../workqueue-distangle-from-rq-lock.patch | 2 +- .../workqueue-prevent-deadlock-stall.patch | 2 +- .../patches-rt/workqueue-use-locallock.patch | 2 +- debian/patches-rt/workqueue-use-rcu.patch | 2 +- ...ypto-reduce-preempt-disabled-regions.patch | 2 +- ...fi-drop-task_lock-from-efi_switch_mm.patch | 2 +- ...e-preemption-around-local_bh_disable.patch | 2 +- ...highmem-add-a-already-used-pte-check.patch | 2 +- ...-let-setaffinity-unmask-threaded-EOI.patch | 2 +- .../x86-kvm-require-const-tsc-for-rt.patch | 2 +- ...le-preemption-__split_large_page-aft.patch | 2 +- debian/patches-rt/x86-preempt-lazy.patch | 2 +- ...ignal-delay-calling-signals-on-32bit.patch | 2 +- .../x86-stackprot-no-random-on-rt.patch | 2 +- .../x86-use-gen-rwsem-spinlocks-rt.patch | 2 +- 259 files changed, 556 insertions(+), 290 deletions(-) create mode 100644 debian/patches-rt/drm-i915-skip-DRM_I915_LOW_LEVEL_TRACEPOINTS-with-NO.patch create mode 100644 debian/patches-rt/kmemleak-Turn-kmemleak_lock-to-raw-spinlock-on-RT.patch create mode 100644 debian/patches-rt/perf-x86-intel-Delay-memory-deallocation-until-cpu_d.patch diff --git a/debian/changelog b/debian/changelog index 6729c5e06..a672047e8 100644 --- a/debian/changelog +++ b/debian/changelog @@ -17,6 +17,9 @@ linux (4.19.12-2) UNRELEASED; urgency=medium * USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data (CVE-2018-19985) + [ Romain Perier ] + * [rt] Update to 4.19.10-rt8 + -- Uwe Kleine-König Sun, 23 Dec 2018 17:28:52 +0100 linux (4.19.12-1) unstable; urgency=medium diff --git a/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch b/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch index 977adab85..af86a8746 100644 --- a/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch +++ b/debian/patches-rt/0001-ARM-at91-add-TCB-registers-definitions.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:18 +0200 Subject: [PATCH 1/7] ARM: at91: add TCB registers definitions -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Add registers and bits definitions for the timer counter blocks found on Atmel ARM SoCs. diff --git a/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch b/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch index ffbfa439b..21836f3d7 100644 --- a/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch +++ b/debian/patches-rt/0001-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch @@ -2,7 +2,7 @@ From: Peter Zijlstra Date: Mon, 28 May 2018 15:24:20 +0200 Subject: [PATCH 1/4] Split IRQ-off and zone->lock while freeing pages from PCP list #1 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Split the IRQ-off section while accessing the PCP list from zone->lock while freeing pages. diff --git a/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch b/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch index 55bcd8712..f73cb8c81 100644 --- a/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch +++ b/debian/patches-rt/0002-Split-IRQ-off-and-zone-lock-while-freeing-pages-from.patch @@ -2,7 +2,7 @@ From: Peter Zijlstra Date: Mon, 28 May 2018 15:24:21 +0200 Subject: [PATCH 2/4] Split IRQ-off and zone->lock while freeing pages from PCP list #2 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Split the IRQ-off section while accessing the PCP list from zone->lock while freeing pages. diff --git a/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch b/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch index 6c59f55bb..49a920887 100644 --- a/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch +++ b/debian/patches-rt/0002-clocksource-drivers-Add-a-new-driver-for-the-Atmel-A.patch @@ -2,7 +2,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:19 +0200 Subject: [PATCH 2/7] clocksource/drivers: Add a new driver for the Atmel ARM TC blocks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Add a driver for the Atmel Timer Counter Blocks. This driver provides a clocksource and two clockevent devices. diff --git a/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch b/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch index 50cebc1c8..5e1223037 100644 --- a/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch +++ b/debian/patches-rt/0003-clocksource-drivers-timer-atmel-tcb-add-clockevent-d.patch @@ -2,7 +2,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:20 +0200 Subject: [PATCH 3/7] clocksource/drivers: timer-atmel-tcb: add clockevent device on separate channel -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Add an other clockevent device that uses a separate TCB channel when available. diff --git a/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch b/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch index 3e177149d..0b9db8b14 100644 --- a/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch +++ b/debian/patches-rt/0003-mm-SLxB-change-list_lock-to-raw_spinlock_t.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Mon, 28 May 2018 15:24:22 +0200 Subject: [PATCH 3/4] mm/SLxB: change list_lock to raw_spinlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The list_lock is used with used with IRQs off on RT. Make it a raw_spinlock_t otherwise the interrupts won't be disabled on -RT. The locking rules remain diff --git a/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch b/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch index 67d533e99..dc49cbfb7 100644 --- a/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch +++ b/debian/patches-rt/0004-clocksource-drivers-atmel-pit-make-option-silent.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:21 +0200 Subject: [PATCH 4/7] clocksource/drivers: atmel-pit: make option silent -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz To conform with the other option, make the ATMEL_PIT option silent so it can be selected from the platform diff --git a/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch b/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch index a392342d0..2649953e1 100644 --- a/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch +++ b/debian/patches-rt/0004-mm-SLUB-delay-giving-back-empty-slubs-to-IRQ-enabled.patch @@ -2,7 +2,7 @@ From: Thomas Gleixner Date: Thu, 21 Jun 2018 17:29:19 +0200 Subject: [PATCH 4/4] mm/SLUB: delay giving back empty slubs to IRQ enabled regions -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz __free_slab() is invoked with disabled interrupts which increases the irq-off time while __free_pages() is doing the work. diff --git a/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch b/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch index a3e5fad0c..8523f0d4e 100644 --- a/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch +++ b/debian/patches-rt/0005-ARM-at91-Implement-clocksource-selection.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:22 +0200 Subject: [PATCH 5/7] ARM: at91: Implement clocksource selection -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Allow selecting and unselecting the PIT clocksource driver so it doesn't have to be compile when unused. diff --git a/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch b/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch index f8993e031..7a5b36e60 100644 --- a/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch +++ b/debian/patches-rt/0006-ARM-configs-at91-use-new-TCB-timer-driver.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:23 +0200 Subject: [PATCH 6/7] ARM: configs: at91: use new TCB timer driver -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Unselecting ATMEL_TCLIB switches the TCB timer driver from tcb_clksrc to timer-atmel-tcb. diff --git a/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch b/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch index 6a48749a2..00e106ba3 100644 --- a/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch +++ b/debian/patches-rt/0007-ARM-configs-at91-unselect-PIT.patch @@ -1,7 +1,7 @@ From: Alexandre Belloni Date: Thu, 13 Sep 2018 13:30:24 +0200 Subject: [PATCH 7/7] ARM: configs: at91: unselect PIT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The PIT is not required anymore to successfully boot and may actually harm in case preempt-rt is used because the PIT interrupt is shared. diff --git a/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch b/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch index 501e892d6..cdea1dec1 100644 --- a/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch +++ b/debian/patches-rt/ARM-enable-irq-in-translation-section-permission-fau.patch @@ -1,7 +1,7 @@ From: "Yadi.hu" Date: Wed, 10 Dec 2014 10:32:09 +0800 Subject: ARM: enable irq in translation/section permission fault handlers -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Probably happens on all ARM, with CONFIG_PREEMPT_RT_FULL diff --git a/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch b/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch index 8fcb18753..e3fd42650 100644 --- a/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch +++ b/debian/patches-rt/Drivers-hv-vmbus-include-header-for-get_irq_regs.patch @@ -4,7 +4,7 @@ Subject: [PATCH] Drivers: hv: vmbus: include header for get_irq_regs() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On !RT the header file get_irq_regs() gets pulled in via other header files. On RT it does not and the build fails: diff --git a/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch b/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch index 8574312be..a87e8e45d 100644 --- a/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch +++ b/debian/patches-rt/EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch @@ -1,7 +1,7 @@ From: Paul E. McKenney Date: Mon, 29 Oct 2018 11:53:01 +0100 Subject: [PATCH] EXP rcu: Revert expedited GP parallelization cleverness -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz (Commit 258ba8e089db23f760139266c232f01bad73f85c from linux-rcu) diff --git a/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch b/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch index 2f03e65ac..7145898b4 100644 --- a/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch +++ b/debian/patches-rt/HACK-printk-drop-the-logbuf_lock-more-often.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 21 Mar 2013 19:01:05 +0100 Subject: printk: Drop the logbuf_lock more often -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The lock is hold with irgs off. The latency drops 500us+ on my arm bugs with a "full" buffer after executing "dmesg" on the shell. diff --git a/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch b/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch index 4f55e584e..48b2e4af0 100644 --- a/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch +++ b/debian/patches-rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Thu, 11 Feb 2016 11:54:01 -0600 Subject: KVM: arm/arm64: downgrade preempt_disable()d region to migrate_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz kvm_arch_vcpu_ioctl_run() disables the use of preemption when updating the vgic and timer states to prevent the calling task from migrating to diff --git a/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch b/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch index acacbc2e1..44c24d227 100644 --- a/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch +++ b/debian/patches-rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch @@ -5,7 +5,7 @@ Cc: Anna Schumaker , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de Subject: NFSv4: replace seqcount_t with a seqlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The raw_write_seqcount_begin() in nfs4_reclaim_open_state() bugs me because it maps to preempt_disable() in -RT which I can't have at this @@ -47,7 +47,7 @@ Signed-off-by: Sebastian Andrzej Siewior put_nfs_open_context(ctx); --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h -@@ -112,7 +112,7 @@ struct nfs4_state_owner { +@@ -114,7 +114,7 @@ struct nfs4_state_owner { unsigned long so_flags; struct list_head so_states; struct nfs_seqid_counter so_seqid; @@ -87,7 +87,7 @@ Signed-off-by: Sebastian Andrzej Siewior mutex_init(&sp->so_delegreturn_mutex); return sp; } -@@ -1563,8 +1563,12 @@ static int nfs4_reclaim_open_state(struc +@@ -1564,8 +1564,12 @@ static int nfs4_reclaim_open_state(struc * recovering after a network partition or a reboot from a * server that doesn't support a grace period. */ @@ -101,7 +101,7 @@ Signed-off-by: Sebastian Andrzej Siewior restart: list_for_each_entry(state, &sp->so_states, open_states) { if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) -@@ -1651,14 +1655,20 @@ static int nfs4_reclaim_open_state(struc +@@ -1652,14 +1656,20 @@ static int nfs4_reclaim_open_state(struc spin_lock(&sp->so_lock); goto restart; } diff --git a/debian/patches-rt/add_migrate_disable.patch b/debian/patches-rt/add_migrate_disable.patch index f3d75c648..62bad8bae 100644 --- a/debian/patches-rt/add_migrate_disable.patch +++ b/debian/patches-rt/add_migrate_disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Sat, 27 May 2017 19:02:06 +0200 Subject: kernel/sched/core: add migrate_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz --- include/linux/preempt.h | 23 ++++++++ diff --git a/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch b/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch index a594cafa2..ed9b86609 100644 --- a/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch +++ b/debian/patches-rt/apparmor-use-a-locallock-instead-preempt_disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 11 Oct 2017 17:43:49 +0200 Subject: apparmor: use a locallock instead preempt_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz get_buffers() disables preemption which acts as a lock for the per-CPU variable. Since we can't disable preemption here on RT, a local_lock is diff --git a/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch b/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch index aa17b6b46..903912e4f 100644 --- a/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch +++ b/debian/patches-rt/arch-arm64-Add-lazy-preempt-support.patch @@ -1,7 +1,7 @@ From: Anders Roxell Date: Thu, 14 May 2015 17:52:17 +0200 Subject: arch/arm64: Add lazy preempt support -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz arm64 is missing support for PREEMPT_RT. The main feature which is lacking is support for lazy preemption. The arch-specific entry code, diff --git a/debian/patches-rt/arm-convert-boot-lock-to-raw.patch b/debian/patches-rt/arm-convert-boot-lock-to-raw.patch index c661e87b7..2eb4095f4 100644 --- a/debian/patches-rt/arm-convert-boot-lock-to-raw.patch +++ b/debian/patches-rt/arm-convert-boot-lock-to-raw.patch @@ -1,7 +1,7 @@ From: Frank Rowand Date: Mon, 19 Sep 2011 14:51:14 -0700 Subject: arm: Convert arm boot_lock to raw -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The arm boot_lock is used by the secondary processor startup code. The locking task is the idle thread, which has idle->sched_class == &idle_sched_class. diff --git a/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch b/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch index 27ee64a9c..cf77e7dce 100644 --- a/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch +++ b/debian/patches-rt/arm-disable-NEON-in-kernel-mode.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 1 Dec 2017 10:42:03 +0100 Subject: [PATCH] arm*: disable NEON in kernel mode -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz NEON in kernel mode is used by the crypto algorithms and raid6 code. While the raid6 code looks okay, the crypto algorithms do not: NEON diff --git a/debian/patches-rt/arm-enable-highmem-for-rt.patch b/debian/patches-rt/arm-enable-highmem-for-rt.patch index e6b2be9d6..5419b019c 100644 --- a/debian/patches-rt/arm-enable-highmem-for-rt.patch +++ b/debian/patches-rt/arm-enable-highmem-for-rt.patch @@ -1,7 +1,7 @@ Subject: arm: Enable highmem for rt From: Thomas Gleixner Date: Wed, 13 Feb 2013 11:03:11 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz fixup highmem for ARM. diff --git a/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch b/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch index 292b91842..ebf3b9c5b 100644 --- a/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch +++ b/debian/patches-rt/arm-highmem-flush-tlb-on-unmap.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 11 Mar 2013 21:37:27 +0100 Subject: arm/highmem: Flush tlb on unmap -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The tlb should be flushed on unmap and thus make the mapping entry invalid. This is only done in the non-debug case which does not look diff --git a/debian/patches-rt/arm-include-definition-for-cpumask_t.patch b/debian/patches-rt/arm-include-definition-for-cpumask_t.patch index 64c34b279..1ceac3bb0 100644 --- a/debian/patches-rt/arm-include-definition-for-cpumask_t.patch +++ b/debian/patches-rt/arm-include-definition-for-cpumask_t.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 22 Dec 2016 17:28:33 +0100 Subject: [PATCH] arm: include definition for cpumask_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz This definition gets pulled in by other files. With the (later) split of RCU and spinlock.h it won't compile anymore. diff --git a/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch b/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch index 5646beb29..335dad2f3 100644 --- a/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch +++ b/debian/patches-rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch @@ -1,7 +1,7 @@ From: Yang Shi Date: Thu, 10 Nov 2016 16:17:55 -0800 Subject: [PATCH] arm: kprobe: replace patch_lock to raw lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When running kprobe on -rt kernel, the below bug is caught: diff --git a/debian/patches-rt/arm-preempt-lazy-support.patch b/debian/patches-rt/arm-preempt-lazy-support.patch index dc7d1e9d4..eac5e556a 100644 --- a/debian/patches-rt/arm-preempt-lazy-support.patch +++ b/debian/patches-rt/arm-preempt-lazy-support.patch @@ -1,7 +1,7 @@ Subject: arm: Add support for lazy preemption From: Thomas Gleixner Date: Wed, 31 Oct 2012 12:04:11 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Implement the arm pieces for lazy preempt. diff --git a/debian/patches-rt/arm-unwind-use_raw_lock.patch b/debian/patches-rt/arm-unwind-use_raw_lock.patch index 3063d9010..4f9216e5d 100644 --- a/debian/patches-rt/arm-unwind-use_raw_lock.patch +++ b/debian/patches-rt/arm-unwind-use_raw_lock.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 20 Sep 2013 14:31:54 +0200 Subject: arm/unwind: use a raw_spin_lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Mostly unwind is done with irqs enabled however SLUB may call it with irqs disabled while creating a new SLUB cache. diff --git a/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch b/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch index ef22ffaca..979eb811b 100644 --- a/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch +++ b/debian/patches-rt/arm64-KVM-compute_layout-before-altenates-are-applie.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 09:13:42 +0200 Subject: [PATCH] arm64: KVM: compute_layout before altenates are applied -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz compute_layout() is invoked as part of an alternative fixup under stop_machine() and needs a sleeping lock as part of get_random_long(). diff --git a/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch b/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch index deb855769..233c8b0b0 100644 --- a/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch +++ b/debian/patches-rt/arm64-fpsimd-use-preemp_disable-in-addition-to-local.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 25 Jul 2018 14:02:38 +0200 Subject: [PATCH] arm64: fpsimd: use preemp_disable in addition to local_bh_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In v4.16-RT I noticed a number of warnings from task_fpsimd_load(). The code disables BH and expects that it is not preemptible. On -RT the diff --git a/debian/patches-rt/at91_dont_enable_disable_clock.patch b/debian/patches-rt/at91_dont_enable_disable_clock.patch index 5f0ec08ce..753326e82 100644 --- a/debian/patches-rt/at91_dont_enable_disable_clock.patch +++ b/debian/patches-rt/at91_dont_enable_disable_clock.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 09 Mar 2016 10:51:06 +0100 Subject: arm: at91: do not disable/enable clocks in a row -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Currently the driver will disable the clock and enable it one line later if it is switching from periodic mode into one shot. diff --git a/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch b/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch index 17e956620..8852018c6 100644 --- a/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch +++ b/debian/patches-rt/block-blk-mq-move-blk_queue_usage_counter_release-in.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 13 Mar 2018 13:49:16 +0100 Subject: [PATCH] block: blk-mq: move blk_queue_usage_counter_release() into process context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz | BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914 | in_atomic(): 1, irqs_disabled(): 0, pid: 255, name: kworker/u257:6 diff --git a/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch b/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch index d78ac8df5..601e878dc 100644 --- a/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch +++ b/debian/patches-rt/block-mq-don-t-complete-requests-via-IPI.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 29 Jan 2015 15:10:08 +0100 Subject: block/mq: don't complete requests via IPI -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The IPI runs in hardirq context and there are sleeping locks. This patch moves the completion into a workqueue. diff --git a/debian/patches-rt/block-mq-drop-preempt-disable.patch b/debian/patches-rt/block-mq-drop-preempt-disable.patch index 817f0ec1a..628cfdd1a 100644 --- a/debian/patches-rt/block-mq-drop-preempt-disable.patch +++ b/debian/patches-rt/block-mq-drop-preempt-disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: block/mq: do not invoke preempt_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz preempt_disable() and get_cpu() don't play well together with the sleeping locks it tries to allocate later. diff --git a/debian/patches-rt/block-mq-use-cpu_light.patch b/debian/patches-rt/block-mq-use-cpu_light.patch index b959111e5..79942b00a 100644 --- a/debian/patches-rt/block-mq-use-cpu_light.patch +++ b/debian/patches-rt/block-mq-use-cpu_light.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 9 Apr 2014 10:37:23 +0200 Subject: block: mq: use cpu_light() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz there is a might sleep splat because get_cpu() disables preemption and later we grab a lock. As a workaround for this we use get_cpu_light(). diff --git a/debian/patches-rt/block-use-cpu-chill.patch b/debian/patches-rt/block-use-cpu-chill.patch index 226f98296..bb12a3804 100644 --- a/debian/patches-rt/block-use-cpu-chill.patch +++ b/debian/patches-rt/block-use-cpu-chill.patch @@ -1,7 +1,7 @@ Subject: block: Use cpu_chill() for retry loops From: Thomas Gleixner Date: Thu, 20 Dec 2012 18:28:26 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Steven also observed a live lock when there was a diff --git a/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch b/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch index edf6bf2d7..bc5a7207f 100644 --- a/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch +++ b/debian/patches-rt/cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 3 Jul 2018 18:19:48 +0200 Subject: [PATCH] cgroup: use irqsave in cgroup_rstat_flush_locked() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz All callers of cgroup_rstat_flush_locked() acquire cgroup_rstat_lock either with spin_lock_irq() or spin_lock_irqsave(). diff --git a/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch b/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch index 5ffb713f1..5c17a52de 100644 --- a/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch +++ b/debian/patches-rt/cgroups-use-simple-wait-in-css_release.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 13 Feb 2015 15:52:24 +0100 Subject: cgroups: use simple wait in css_release() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz To avoid: |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914 diff --git a/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch b/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch index 33269a9a8..ee74416d9 100644 --- a/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch +++ b/debian/patches-rt/clocksource-tclib-allow-higher-clockrates.patch @@ -1,7 +1,7 @@ From: Benedikt Spranger Date: Mon, 8 Mar 2010 18:57:04 +0100 Subject: clocksource: TCLIB: Allow higher clock rates for clock events -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz As default the TCLIB uses the 32KiHz base clock rate for clock events. Add a compile time selection to allow higher clock resulution. diff --git a/debian/patches-rt/completion-use-simple-wait-queues.patch b/debian/patches-rt/completion-use-simple-wait-queues.patch index 0f93bb22f..f05c2eb4b 100644 --- a/debian/patches-rt/completion-use-simple-wait-queues.patch +++ b/debian/patches-rt/completion-use-simple-wait-queues.patch @@ -1,7 +1,7 @@ Subject: completion: Use simple wait queues From: Thomas Gleixner Date: Fri, 11 Jan 2013 11:23:51 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Completions have no long lasting callbacks and therefor do not need the complex waitqueue variant. Use simple waitqueues which reduces the @@ -51,7 +51,7 @@ Signed-off-by: Thomas Gleixner default: --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c -@@ -1633,7 +1633,7 @@ static void ffs_data_put(struct ffs_data +@@ -1623,7 +1623,7 @@ static void ffs_data_put(struct ffs_data pr_info("%s(): freeing\n", __func__); ffs_data_clear(ffs); BUG_ON(waitqueue_active(&ffs->ev.waitq) || diff --git a/debian/patches-rt/cond-resched-lock-rt-tweak.patch b/debian/patches-rt/cond-resched-lock-rt-tweak.patch index 3ea048bbc..7c7b38abf 100644 --- a/debian/patches-rt/cond-resched-lock-rt-tweak.patch +++ b/debian/patches-rt/cond-resched-lock-rt-tweak.patch @@ -1,7 +1,7 @@ Subject: sched: Use the proper LOCK_OFFSET for cond_resched() From: Thomas Gleixner Date: Sun, 17 Jul 2011 22:51:33 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz RT does not increment preempt count when a 'sleeping' spinlock is locked. Update PREEMPT_LOCK_OFFSET for that case. diff --git a/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch b/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch index 61f8e6bd6..5db7656a1 100644 --- a/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch +++ b/debian/patches-rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Sun, 16 Oct 2016 05:11:54 +0200 Subject: [PATCH] connector/cn_proc: Protect send_msg() with a local lock on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:931 |in_atomic(): 1, irqs_disabled(): 0, pid: 31807, name: sleep diff --git a/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch b/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch index 14d834119..20c3258a5 100644 --- a/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch +++ b/debian/patches-rt/cpu-hotplug--Implement-CPU-pinning.patch @@ -1,7 +1,7 @@ Subject: cpu/hotplug: Implement CPU pinning From: Thomas Gleixner Date: Wed, 19 Jul 2017 17:31:20 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Thomas Gleixner --- diff --git a/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch b/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch index 448f0fb32..aa34fefae 100644 --- a/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch +++ b/debian/patches-rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 9 Apr 2015 15:23:01 +0200 Subject: cpufreq: drop K8's driver from beeing selected -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Ralf posted a picture of a backtrace from diff --git a/debian/patches-rt/cpumask-disable-offstack-on-rt.patch b/debian/patches-rt/cpumask-disable-offstack-on-rt.patch index 54c6b53e9..1a7a8a1e6 100644 --- a/debian/patches-rt/cpumask-disable-offstack-on-rt.patch +++ b/debian/patches-rt/cpumask-disable-offstack-on-rt.patch @@ -1,7 +1,7 @@ Subject: cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT From: Thomas Gleixner Date: Wed, 14 Dec 2011 01:03:49 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There are "valid" GFP_ATOMIC allocations such as diff --git a/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch b/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch index b760d261b..d57432828 100644 --- a/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch +++ b/debian/patches-rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Sun, 8 Jan 2017 09:32:25 +0100 Subject: [PATCH] cpuset: Convert callback_lock to raw_spinlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The two commits below add up to a cpuset might_sleep() splat for RT: diff --git a/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch b/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch index 229106f39..fc79bf46b 100644 --- a/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch +++ b/debian/patches-rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 21 Feb 2014 17:24:04 +0100 Subject: crypto: Reduce preempt disabled regions, more algos -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Don Estabrook reported | kernel: WARNING: CPU: 2 PID: 858 at kernel/sched/core.c:2428 migrate_disable+0xed/0x100() diff --git a/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch b/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch index 9cd8e034c..298900dcb 100644 --- a/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch +++ b/debian/patches-rt/crypto-caam-qi-simplify-CGR-allocation-freeing.patch @@ -4,7 +4,7 @@ Subject: [PATCH] crypto: caam/qi - simplify CGR allocation, freeing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz [Upstream commit 29e83c757006fd751966bdc53392bb22d74179c6] diff --git a/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch b/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch index 0ae37a2cc..2897d8599 100644 --- a/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch +++ b/debian/patches-rt/crypto-cryptd-add-a-lock-instead-preempt_disable-loc.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 18:52:00 +0200 Subject: [PATCH] crypto: cryptd - add a lock instead preempt_disable/local_bh_disable -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz cryptd has a per-CPU lock which protected with local_bh_disable() and preempt_disable(). diff --git a/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch b/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch index c14f22018..0c43cf70e 100644 --- a/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch +++ b/debian/patches-rt/crypto-limit-more-FPU-enabled-sections.patch @@ -4,7 +4,7 @@ Subject: [PATCH] crypto: limit more FPU-enabled sections MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Those crypto drivers use SSE/AVX/… for their crypto work and in order to do so in kernel they need to enable the "FPU" in kernel mode which diff --git a/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch b/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch index f73b8f76f..38aa070c1 100644 --- a/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch +++ b/debian/patches-rt/crypto-scompress-serialize-RT-percpu-scratch-buffer-.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Wed, 11 Jul 2018 17:14:47 +0200 Subject: [PATCH] crypto: scompress - serialize RT percpu scratch buffer access with a local lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz | BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:974 | in_atomic(): 1, irqs_disabled(): 0, pid: 1401, name: cryptomgr_test diff --git a/debian/patches-rt/debugobjects-rt.patch b/debian/patches-rt/debugobjects-rt.patch index d854d352c..9c405a2a7 100644 --- a/debian/patches-rt/debugobjects-rt.patch +++ b/debian/patches-rt/debugobjects-rt.patch @@ -1,7 +1,7 @@ Subject: debugobjects: Make RT aware From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:41:35 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Avoid filling the pool / allocating memory with irqs off(). @@ -12,7 +12,7 @@ Signed-off-by: Thomas Gleixner --- a/lib/debugobjects.c +++ b/lib/debugobjects.c -@@ -377,7 +377,10 @@ static void +@@ -376,7 +376,10 @@ static void struct debug_obj *obj; unsigned long flags; diff --git a/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch b/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch index 38c4db67a..035403867 100644 --- a/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch +++ b/debian/patches-rt/dm-rq-remove-BUG_ON-irqs_disabled-check.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 27 Mar 2018 16:24:15 +0200 Subject: [PATCH] dm rq: remove BUG_ON(!irqs_disabled) check -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In commit 052189a2ec95 ("dm: remove superfluous irq disablement in dm_request_fn") the spin_lock_irq() was replaced with spin_lock() + a diff --git a/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch b/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch index 02e462db9..2c15080ea 100644 --- a/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch +++ b/debian/patches-rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Thu, 31 Mar 2016 04:08:28 +0200 Subject: [PATCH] drivers/block/zram: Replace bit spinlocks with rtmutex for -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz They're nondeterministic, and lead to ___might_sleep() splats in -rt. OTOH, they're a lot less wasteful than an rtmutex per page. diff --git a/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch b/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch index 206aa8f3b..dbafe2ec2 100644 --- a/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch +++ b/debian/patches-rt/drivers-tty-fix-omap-lock-crap.patch @@ -1,7 +1,7 @@ Subject: tty/serial/omap: Make the locking RT aware From: Thomas Gleixner Date: Thu, 28 Jul 2011 13:32:57 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The lock is a sleeping lock and local_irq_save() is not the optimsation we are looking for. Redo it to make it work on -RT and diff --git a/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch b/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch index 306677daa..997652bf4 100644 --- a/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch +++ b/debian/patches-rt/drivers-tty-pl011-irq-disable-madness.patch @@ -1,7 +1,7 @@ Subject: tty/serial/pl011: Make the locking work on RT From: Thomas Gleixner Date: Tue, 08 Jan 2013 21:36:51 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The lock is a sleeping lock and local_irq_save() is not the optimsation we are looking for. Redo it to make it work on -RT and non-RT. diff --git a/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch b/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch index 71061c4f5..05eda911e 100644 --- a/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch +++ b/debian/patches-rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Thu, 20 Oct 2016 11:15:22 +0200 Subject: [PATCH] drivers/zram: Don't disable preemption in zcomp_stream_get/put() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In v4.7, the driver switched to percpu compression streams, disabling preemption via get/put_cpu_ptr(). Use a per-zcomp_strm lock here. We diff --git a/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch b/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch index fc1385e5b..6f5891c2b 100644 --- a/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch +++ b/debian/patches-rt/drivers-zram-fix-zcomp_stream_get-smp_processor_id-u.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Wed, 23 Aug 2017 11:57:29 +0200 Subject: [PATCH] drivers/zram: fix zcomp_stream_get() smp_processor_id() use in preemptible code -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Use get_local_ptr() instead this_cpu_ptr() to avoid a warning regarding smp_processor_id() in preemptible code. diff --git a/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch b/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch index 46da62eba..e8234ece3 100644 --- a/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch +++ b/debian/patches-rt/drm-i915-disable-tracing-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 6 Dec 2018 09:52:20 +0100 Subject: [PATCH] drm/i915: disable tracing on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Luca Abeni reported this: | BUG: scheduling while atomic: kworker/u8:2/15203/0x00000003 diff --git a/debian/patches-rt/drm-i915-skip-DRM_I915_LOW_LEVEL_TRACEPOINTS-with-NO.patch b/debian/patches-rt/drm-i915-skip-DRM_I915_LOW_LEVEL_TRACEPOINTS-with-NO.patch new file mode 100644 index 000000000..3b85ee401 --- /dev/null +++ b/debian/patches-rt/drm-i915-skip-DRM_I915_LOW_LEVEL_TRACEPOINTS-with-NO.patch @@ -0,0 +1,26 @@ +From: Sebastian Andrzej Siewior +Date: Wed, 19 Dec 2018 10:47:02 +0100 +Subject: [PATCH] drm/i915: skip DRM_I915_LOW_LEVEL_TRACEPOINTS with NOTRACE +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz + +The order of the header files is important. If this header file is +included after tracepoint.h was included then the NOTRACE here becomes a +nop. Currently this happens for two .c files which use the tracepoitns +behind DRM_I915_LOW_LEVEL_TRACEPOINTS. + +Signed-off-by: Sebastian Andrzej Siewior +--- + drivers/gpu/drm/i915/i915_trace.h | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/gpu/drm/i915/i915_trace.h ++++ b/drivers/gpu/drm/i915/i915_trace.h +@@ -683,7 +683,7 @@ DEFINE_EVENT(i915_request, i915_request_ + TP_ARGS(rq) + ); + +-#if defined(CONFIG_DRM_I915_LOW_LEVEL_TRACEPOINTS) ++#if defined(CONFIG_DRM_I915_LOW_LEVEL_TRACEPOINTS) && !defined(NOTRACE) + DEFINE_EVENT(i915_request, i915_request_submit, + TP_PROTO(struct i915_request *rq), + TP_ARGS(rq) diff --git a/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch b/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch index cc69cf70f..71fd69912 100644 --- a/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch +++ b/debian/patches-rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch @@ -1,7 +1,7 @@ Subject: drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end() From: Mike Galbraith Date: Sat, 27 Feb 2016 09:01:42 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz [ 8.014039] BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:918 diff --git a/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch b/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch index 54cfbc0f3..5b54b22ee 100644 --- a/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch +++ b/debian/patches-rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch @@ -1,7 +1,7 @@ Subject: drm,radeon,i915: Use preempt_disable/enable_rt() where recommended From: Mike Galbraith Date: Sat, 27 Feb 2016 08:09:11 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz DRM folks identified the spots, so use them. diff --git a/debian/patches-rt/efi-Allow-efi-runtime.patch b/debian/patches-rt/efi-Allow-efi-runtime.patch index 0d9e35837..3b6dd6110 100644 --- a/debian/patches-rt/efi-Allow-efi-runtime.patch +++ b/debian/patches-rt/efi-Allow-efi-runtime.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 15:06:10 +0200 Subject: [PATCH] efi: Allow efi=runtime -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In case the option "efi=noruntime" is default at built-time, the user could overwrite its sate by `efi=runtime' and allow it again. diff --git a/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch b/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch index da93e6ff2..df4071354 100644 --- a/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch +++ b/debian/patches-rt/efi-Disable-runtime-services-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 26 Jul 2018 15:03:16 +0200 Subject: [PATCH] efi: Disable runtime services on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Based on meassurements the EFI functions get_variable / get_next_variable take up to 2us which looks okay. diff --git a/debian/patches-rt/epoll-use-get-cpu-light.patch b/debian/patches-rt/epoll-use-get-cpu-light.patch index fb39b9ac2..4426dffe2 100644 --- a/debian/patches-rt/epoll-use-get-cpu-light.patch +++ b/debian/patches-rt/epoll-use-get-cpu-light.patch @@ -1,7 +1,7 @@ Subject: fs/epoll: Do not disable preemption on RT From: Thomas Gleixner Date: Fri, 08 Jul 2011 16:35:35 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz ep_call_nested() takes a sleeping lock so we can't disable preemption. The light version is enough since ep_call_nested() doesn't mind beeing diff --git a/debian/patches-rt/fs-aio-simple-simple-work.patch b/debian/patches-rt/fs-aio-simple-simple-work.patch index 9d481d668..aed5172d8 100644 --- a/debian/patches-rt/fs-aio-simple-simple-work.patch +++ b/debian/patches-rt/fs-aio-simple-simple-work.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 16 Feb 2015 18:49:10 +0100 Subject: fs/aio: simple simple work -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:768 |in_atomic(): 1, irqs_disabled(): 0, pid: 26, name: rcuos/2 diff --git a/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch b/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch index 483ff50a2..95127bcd9 100644 --- a/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch +++ b/debian/patches-rt/fs-dcache-bring-back-explicit-INIT_HLIST_BL_HEAD-in.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 13 Sep 2017 12:32:34 +0200 Subject: [PATCH] fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Commit 3d375d78593c ("mm: update callers to use HASH_ZERO flag") removed INIT_HLIST_BL_HEAD and uses the ZERO flag instead for the init. However diff --git a/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch b/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch index 905fcea66..c3fc331c1 100644 --- a/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch +++ b/debian/patches-rt/fs-dcache-disable-preemption-on-i_dir_seq-s-write-si.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 20 Oct 2017 11:29:53 +0200 Subject: [PATCH] fs/dcache: disable preemption on i_dir_seq's write side -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz i_dir_seq is an opencoded seqcounter. Based on the code it looks like we could have two writers in parallel despite the fact that the d_lock is diff --git a/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch b/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch index 532515d93..4d4e54ef1 100644 --- a/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch +++ b/debian/patches-rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch @@ -1,7 +1,7 @@ Subject: fs: dcache: Use cpu_chill() in trylock loops From: Thomas Gleixner Date: Wed, 07 Mar 2012 21:00:34 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Use cpu_chill() instead of cpu_relax() to let the system diff --git a/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch b/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch index 3cafde8be..dae1186ce 100644 --- a/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch +++ b/debian/patches-rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 14 Sep 2016 14:35:49 +0200 Subject: [PATCH] fs/dcache: use swait_queue instead of waitqueue -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz __d_lookup_done() invokes wake_up_all() while holding a hlist_bl_lock() which disables preemption. As a workaround convert it to swait. diff --git a/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch b/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch index c1d3a74ee..58973dec1 100644 --- a/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch +++ b/debian/patches-rt/fs-jbd-replace-bh_state-lock.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 18 Mar 2011 10:11:25 +0100 Subject: fs: jbd/jbd2: Make state lock and journal head lock rt safe -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz bit_spin_locks break under RT. diff --git a/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch b/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch index 7fcc3c4f9..d06d43149 100644 --- a/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch +++ b/debian/patches-rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 15 Sep 2016 10:51:27 +0200 Subject: [PATCH] fs/nfs: turn rmdir_sem into a semaphore -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The RW semaphore had a reader side which used the _non_owner version because it most likely took the reader lock in one thread and released it diff --git a/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch b/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch index bd754acc2..4714cb54e 100644 --- a/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch +++ b/debian/patches-rt/fs-replace-bh_uptodate_lock-for-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 18 Mar 2011 09:18:52 +0100 Subject: buffer_head: Replace bh_uptodate_lock for -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Wrap the bit_spin_lock calls into a separate inline and add the RT replacements with a real spinlock. diff --git a/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch b/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch index 84ce15fda..8a3698c70 100644 --- a/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch +++ b/debian/patches-rt/fscache-initialize-cookie-hash-table-raw-spinlocks.patch @@ -1,7 +1,7 @@ From: Clark Williams Date: Tue, 3 Jul 2018 13:34:30 -0500 Subject: [PATCH] fscache: initialize cookie hash table raw spinlocks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The fscache cookie mechanism uses a hash table of hlist_bl_head structures. The PREEMPT_RT patcheset adds a raw spinlock to this structure and so on PREEMPT_RT diff --git a/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch b/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch index 7fe39db18..5f0137ee0 100644 --- a/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch +++ b/debian/patches-rt/ftrace-Fix-trace-header-alignment.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Sun, 16 Oct 2016 05:08:30 +0200 Subject: [PATCH] ftrace: Fix trace header alignment -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Line up helper arrows to the right column. diff --git a/debian/patches-rt/ftrace-migrate-disable-tracing.patch b/debian/patches-rt/ftrace-migrate-disable-tracing.patch index 1497456e9..0f9be281e 100644 --- a/debian/patches-rt/ftrace-migrate-disable-tracing.patch +++ b/debian/patches-rt/ftrace-migrate-disable-tracing.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:56:42 +0200 Subject: trace: Add migrate-disabled counter to tracing output -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Thomas Gleixner --- diff --git a/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch b/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch index a8dce88c5..d5b300848 100644 --- a/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch +++ b/debian/patches-rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 1 Mar 2013 11:17:42 +0100 Subject: futex: Ensure lock/unlock symetry versus pi_lock and hash bucket lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In exit_pi_state_list() we have the following locking construct: diff --git a/debian/patches-rt/futex-requeue-pi-fix.patch b/debian/patches-rt/futex-requeue-pi-fix.patch index b7389b5f5..8a1df1565 100644 --- a/debian/patches-rt/futex-requeue-pi-fix.patch +++ b/debian/patches-rt/futex-requeue-pi-fix.patch @@ -1,7 +1,7 @@ From: Steven Rostedt Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: futex: Fix bug on when a requeued RT task times out -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Requeue with timeout causes a bug with PREEMPT_RT_FULL. diff --git a/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch b/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch index 04f50d814..a6750a62a 100644 --- a/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch +++ b/debian/patches-rt/futex-workaround-migrate_disable-enable-in-different.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Wed, 8 Mar 2017 14:23:35 +0100 Subject: [PATCH] futex: workaround migrate_disable/enable in different context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz migrate_disable()/migrate_enable() takes a different path in atomic() vs !atomic() context. These little hacks ensure that we don't underflow / overflow diff --git a/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch b/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch index 26c8ad1b1..e1377e8c5 100644 --- a/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch +++ b/debian/patches-rt/genirq-disable-irqpoll-on-rt.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:57 -0500 Subject: genirq: Disable irqpoll on -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Creates long latencies for no value diff --git a/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch b/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch index efa5b9624..b0fd64b23 100644 --- a/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch +++ b/debian/patches-rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 21 Aug 2013 17:48:46 +0200 Subject: genirq: Do not invoke the affinity callback via a workqueue on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Joe Korty reported, that __irq_set_affinity_locked() schedules a workqueue while holding a rawlock which results in a might_sleep() diff --git a/debian/patches-rt/genirq-force-threading.patch b/debian/patches-rt/genirq-force-threading.patch index 5a5d395d8..2a63d40d4 100644 --- a/debian/patches-rt/genirq-force-threading.patch +++ b/debian/patches-rt/genirq-force-threading.patch @@ -1,7 +1,7 @@ Subject: genirq: Force interrupt thread on RT From: Thomas Gleixner Date: Sun, 03 Apr 2011 11:57:29 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Force threaded_irqs and optimize the code (force_irqthreads) in regard to this. diff --git a/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch b/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch index de8fef266..65732abe6 100644 --- a/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch +++ b/debian/patches-rt/genirq-update-irq_set_irqchip_state-documentation.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Thu, 11 Feb 2016 11:54:00 -0600 Subject: genirq: update irq_set_irqchip_state documentation -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On -rt kernels, the use of migrate_disable()/migrate_enable() is sufficient to guarantee a task isn't moved to another CPU. Update the diff --git a/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch b/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch index 0f84d07c4..c7306768b 100644 --- a/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch +++ b/debian/patches-rt/hotplug-duct-tape-RT-rwlock-usage-for-non-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 4 Aug 2017 18:31:00 +0200 Subject: [PATCH] hotplug: duct-tape RT-rwlock usage for non-RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz This type is only available on -RT. We need to craft something for non-RT. Since the only migrate_disable() user is -RT only, there is no diff --git a/debian/patches-rt/hotplug-light-get-online-cpus.patch b/debian/patches-rt/hotplug-light-get-online-cpus.patch index bce5f5a1b..4989fc658 100644 --- a/debian/patches-rt/hotplug-light-get-online-cpus.patch +++ b/debian/patches-rt/hotplug-light-get-online-cpus.patch @@ -1,7 +1,7 @@ Subject: hotplug: Lightweight get online cpus From: Thomas Gleixner Date: Wed, 15 Jun 2011 12:36:06 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz get_online_cpus() is a heavy weight function which involves a global mutex. migrate_disable() wants a simpler construct which prevents only diff --git a/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch b/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch index f45887314..c83f20975 100644 --- a/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch +++ b/debian/patches-rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch @@ -1,7 +1,7 @@ From: Yang Shi Date: Mon, 16 Sep 2013 14:09:19 -0700 Subject: hrtimer: Move schedule_work call to helper thread -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When run ltp leapsec_timer test, the following call trace is caught: diff --git a/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch b/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch index cb1173a7e..0c60215c4 100644 --- a/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch +++ b/debian/patches-rt/hrtimer-by-timers-by-default-into-the-softirq-context.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 3 Jul 2009 08:44:31 -0500 Subject: hrtimer: by timers by default into the softirq context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz We can't have hrtimers callbacks running in hardirq context on RT. Therefore the timers are deferred to the softirq context by default. diff --git a/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch b/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch index 784f7a576..1bfe18913 100644 --- a/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch +++ b/debian/patches-rt/hrtimer-consolidate-hrtimer_init-hrtimer_init_sleepe.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 3 Jul 2018 11:25:41 +0200 Subject: [PATCH v2] hrtimer: consolidate hrtimer_init() + hrtimer_init_sleeper() calls -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz hrtimer_init_sleeper() calls require a prior initialisation of the hrtimer object with hrtimer_init(). Lets make the initialisation of diff --git a/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch b/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch index 92e3a299e..d456ac143 100644 --- a/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch +++ b/debian/patches-rt/hrtimer-move-state-change-before-hrtimer_cancel-in-d.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 6 Dec 2018 10:15:13 +0100 Subject: [PATCH] hrtimer: move state change before hrtimer_cancel in do_nanosleep() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There is a small window between setting t->task to NULL and waking the task up (which would set TASK_RUNNING). So the timer would fire, run and diff --git a/debian/patches-rt/hrtimers-prepare-full-preemption.patch b/debian/patches-rt/hrtimers-prepare-full-preemption.patch index 90e234eef..78e9203cb 100644 --- a/debian/patches-rt/hrtimers-prepare-full-preemption.patch +++ b/debian/patches-rt/hrtimers-prepare-full-preemption.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:34 -0500 Subject: hrtimers: Prepare full preemption -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Make cancellation of a running callback in softirq context safe against preemption. diff --git a/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch b/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch index 031585911..cec6ebc68 100644 --- a/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch +++ b/debian/patches-rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch @@ -1,7 +1,7 @@ Subject: genirq: Allow disabling of softirq processing in irq thread context From: Thomas Gleixner Date: Tue, 31 Jan 2012 13:01:27 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The processing of softirqs in irq thread context is a performance gain for the non-rt workloads of a system, but it's counterproductive for diff --git a/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch b/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch index 78cfab585..28ec9a314 100644 --- a/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch +++ b/debian/patches-rt/irqchip-gic-v3-its-Move-pending-table-allocation-to-.patch @@ -2,7 +2,7 @@ From: Marc Zyngier Date: Fri, 27 Jul 2018 13:38:54 +0100 Subject: [PATCH] irqchip/gic-v3-its: Move pending table allocation to init time -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Marc Zyngier Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch b/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch index 2b9e6a550..b57aeae2e 100644 --- a/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch +++ b/debian/patches-rt/irqwork-push_most_work_into_softirq_context.patch @@ -1,7 +1,7 @@ Subject: irqwork: push most work into softirq context From: Sebastian Andrzej Siewior Date: Tue, 23 Jun 2015 15:32:51 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Initially we defered all irqwork into softirq because we didn't want the latency spikes if perf or another user was busy and delayed the RT task. diff --git a/debian/patches-rt/jump-label-rt.patch b/debian/patches-rt/jump-label-rt.patch index 4dbc68f4a..2ed9e2429 100644 --- a/debian/patches-rt/jump-label-rt.patch +++ b/debian/patches-rt/jump-label-rt.patch @@ -1,7 +1,7 @@ Subject: jump-label: disable if stop_machine() is used From: Thomas Gleixner Date: Wed, 08 Jul 2015 17:14:48 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Some architectures are using stop_machine() while switching the opcode which leads to latency spikes. diff --git a/debian/patches-rt/kconfig-disable-a-few-options-rt.patch b/debian/patches-rt/kconfig-disable-a-few-options-rt.patch index d67f43d09..2c291c7e1 100644 --- a/debian/patches-rt/kconfig-disable-a-few-options-rt.patch +++ b/debian/patches-rt/kconfig-disable-a-few-options-rt.patch @@ -1,7 +1,7 @@ Subject: kconfig: Disable config options which are not RT compatible From: Thomas Gleixner Date: Sun, 24 Jul 2011 12:11:43 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Disable stuff which is known to have issues on RT diff --git a/debian/patches-rt/kconfig-preempt-rt-full.patch b/debian/patches-rt/kconfig-preempt-rt-full.patch index b563b623c..b11847d18 100644 --- a/debian/patches-rt/kconfig-preempt-rt-full.patch +++ b/debian/patches-rt/kconfig-preempt-rt-full.patch @@ -1,7 +1,7 @@ Subject: kconfig: Add PREEMPT_RT_FULL From: Thomas Gleixner Date: Wed, 29 Jun 2011 14:58:57 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Introduce the final symbol for PREEMPT_RT_FULL. diff --git a/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch b/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch index a226dc421..f47976a6c 100644 --- a/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch +++ b/debian/patches-rt/kernel-printk-Don-t-try-to-print-from-IRQ-NMI-region.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 19 May 2016 17:45:27 +0200 Subject: [PATCH] kernel/printk: Don't try to print from IRQ/NMI region -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On -RT we try to acquire sleeping locks which might lead to warnings from lockdep or a warn_on() from spin_try_lock() (which is a rtmutex on diff --git a/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch b/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch index b63847fa1..631e0d77a 100644 --- a/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch +++ b/debian/patches-rt/kernel-sched-Provide-a-pointer-to-the-valid-CPU-mask.patch @@ -4,7 +4,7 @@ Subject: [PATCH] kernel: sched: Provide a pointer to the valid CPU mask MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In commit 4b53a3412d66 ("sched/core: Remove the tsk_nr_cpus_allowed() wrapper") the tsk_nr_cpus_allowed() wrapper was removed. There was not diff --git a/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch b/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch index 52a4e432e..83ae45535 100644 --- a/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch +++ b/debian/patches-rt/kernel-sched-move-stack-kprobe-clean-up-to-__put_tas.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 21 Nov 2016 19:31:08 +0100 Subject: [PATCH] kernel/sched: move stack + kprobe clean up to __put_task_struct() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There is no need to free the stack before the task struct (except for reasons mentioned in commit 68f24b08ee89 ("sched/core: Free the stack early if diff --git a/debian/patches-rt/kgb-serial-hackaround.patch b/debian/patches-rt/kgb-serial-hackaround.patch index 87c7a8a0f..957016ead 100644 --- a/debian/patches-rt/kgb-serial-hackaround.patch +++ b/debian/patches-rt/kgb-serial-hackaround.patch @@ -1,7 +1,7 @@ From: Jason Wessel Date: Thu, 28 Jul 2011 12:42:23 -0500 Subject: kgdb/serial: Short term workaround -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On 07/27/2011 04:37 PM, Thomas Gleixner wrote: > - KGDB (not yet disabled) is reportedly unusable on -rt right now due diff --git a/debian/patches-rt/kmemleak-Turn-kmemleak_lock-to-raw-spinlock-on-RT.patch b/debian/patches-rt/kmemleak-Turn-kmemleak_lock-to-raw-spinlock-on-RT.patch new file mode 100644 index 000000000..a1de4b230 --- /dev/null +++ b/debian/patches-rt/kmemleak-Turn-kmemleak_lock-to-raw-spinlock-on-RT.patch @@ -0,0 +1,160 @@ +From: He Zhe +Date: Wed, 19 Dec 2018 16:30:57 +0100 +Subject: [PATCH] kmemleak: Turn kmemleak_lock to raw spinlock on RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz + +kmemleak_lock, as a rwlock on RT, can possibly be held in atomic context and +causes the follow BUG. + +BUG: scheduling while atomic: migration/15/132/0x00000002 +Preemption disabled at: +[] cpu_stopper_thread+0x71/0x100 +CPU: 15 PID: 132 Comm: migration/15 Not tainted 4.19.0-rt1-preempt-rt #1 +Call Trace: + schedule+0x3d/0xe0 + __rt_spin_lock+0x26/0x30 + __write_rt_lock+0x23/0x1a0 + rt_write_lock+0x2a/0x30 + find_and_remove_object+0x1e/0x80 + delete_object_full+0x10/0x20 + kmemleak_free+0x32/0x50 + kfree+0x104/0x1f0 + intel_pmu_cpu_dying+0x67/0x70 + x86_pmu_dying_cpu+0x1a/0x30 + cpuhp_invoke_callback+0x92/0x700 + take_cpu_down+0x70/0xa0 + multi_cpu_stop+0x62/0xc0 + cpu_stopper_thread+0x79/0x100 + smpboot_thread_fn+0x20f/0x2d0 + kthread+0x121/0x140 + +And on v4.18 stable tree the following call trace, caused by grabbing +kmemleak_lock again, is also observed. + +kernel BUG at kernel/locking/rtmutex.c:1048! +CPU: 5 PID: 689 Comm: mkfs.ext4 Not tainted 4.18.16-rt9-preempt-rt #1 +Call Trace: + rt_write_lock+0x2a/0x30 + create_object+0x17d/0x2b0 + kmemleak_alloc+0x34/0x50 + kmem_cache_alloc+0x146/0x220 + mempool_alloc_slab+0x15/0x20 + mempool_alloc+0x65/0x170 + sg_pool_alloc+0x21/0x60 + sg_alloc_table_chained+0x8b/0xb0 +… + blk_flush_plug_list+0x204/0x230 + schedule+0x87/0xe0 + rt_write_lock+0x2a/0x30 + create_object+0x17d/0x2b0 + kmemleak_alloc+0x34/0x50 + __kmalloc_node+0x1cd/0x340 + alloc_request_size+0x30/0x70 + mempool_alloc+0x65/0x170 + get_request+0x4e3/0x8d0 + blk_queue_bio+0x153/0x470 + generic_make_request+0x1dc/0x3f0 + submit_bio+0x49/0x140 +… + +kmemleak is an error detecting feature. We would not expect as good performance +as without it. As there is no raw rwlock defining helpers, we turn kmemleak_lock +to a raw spinlock. + +Signed-off-by: He Zhe +Cc: catalin.marinas@arm.com +Cc: bigeasy@linutronix.de +Cc: tglx@linutronix.de +Cc: rostedt@goodmis.org +Acked-by: Catalin Marinas +Link: https://lkml.kernel.org/r/1542877459-144382-1-git-send-email-zhe.he@windriver.com +Link: https://lkml.kernel.org/r/20181218150744.GB20197@arrakis.emea.arm.com +Signed-off-by: Sebastian Andrzej Siewior +--- + mm/kmemleak.c | 20 ++++++++++---------- + 1 file changed, 10 insertions(+), 10 deletions(-) + +--- a/mm/kmemleak.c ++++ b/mm/kmemleak.c +@@ -26,7 +26,7 @@ + * + * The following locks and mutexes are used by kmemleak: + * +- * - kmemleak_lock (rwlock): protects the object_list modifications and ++ * - kmemleak_lock (raw spinlock): protects the object_list modifications and + * accesses to the object_tree_root. The object_list is the main list + * holding the metadata (struct kmemleak_object) for the allocated memory + * blocks. The object_tree_root is a red black tree used to look-up +@@ -197,7 +197,7 @@ static LIST_HEAD(gray_list); + /* search tree for object boundaries */ + static struct rb_root object_tree_root = RB_ROOT; + /* rw_lock protecting the access to object_list and object_tree_root */ +-static DEFINE_RWLOCK(kmemleak_lock); ++static DEFINE_RAW_SPINLOCK(kmemleak_lock); + + /* allocation caches for kmemleak internal data */ + static struct kmem_cache *object_cache; +@@ -491,9 +491,9 @@ static struct kmemleak_object *find_and_ + struct kmemleak_object *object; + + rcu_read_lock(); +- read_lock_irqsave(&kmemleak_lock, flags); ++ raw_spin_lock_irqsave(&kmemleak_lock, flags); + object = lookup_object(ptr, alias); +- read_unlock_irqrestore(&kmemleak_lock, flags); ++ raw_spin_unlock_irqrestore(&kmemleak_lock, flags); + + /* check whether the object is still available */ + if (object && !get_object(object)) +@@ -513,13 +513,13 @@ static struct kmemleak_object *find_and_ + unsigned long flags; + struct kmemleak_object *object; + +- write_lock_irqsave(&kmemleak_lock, flags); ++ raw_spin_lock_irqsave(&kmemleak_lock, flags); + object = lookup_object(ptr, alias); + if (object) { + rb_erase(&object->rb_node, &object_tree_root); + list_del_rcu(&object->object_list); + } +- write_unlock_irqrestore(&kmemleak_lock, flags); ++ raw_spin_unlock_irqrestore(&kmemleak_lock, flags); + + return object; + } +@@ -593,7 +593,7 @@ static struct kmemleak_object *create_ob + /* kernel backtrace */ + object->trace_len = __save_stack_trace(object->trace); + +- write_lock_irqsave(&kmemleak_lock, flags); ++ raw_spin_lock_irqsave(&kmemleak_lock, flags); + + min_addr = min(min_addr, ptr); + max_addr = max(max_addr, ptr + size); +@@ -624,7 +624,7 @@ static struct kmemleak_object *create_ob + + list_add_tail_rcu(&object->object_list, &object_list); + out: +- write_unlock_irqrestore(&kmemleak_lock, flags); ++ raw_spin_unlock_irqrestore(&kmemleak_lock, flags); + return object; + } + +@@ -1310,7 +1310,7 @@ static void scan_block(void *_start, voi + unsigned long *end = _end - (BYTES_PER_POINTER - 1); + unsigned long flags; + +- read_lock_irqsave(&kmemleak_lock, flags); ++ raw_spin_lock_irqsave(&kmemleak_lock, flags); + for (ptr = start; ptr < end; ptr++) { + struct kmemleak_object *object; + unsigned long pointer; +@@ -1367,7 +1367,7 @@ static void scan_block(void *_start, voi + spin_unlock(&object->lock); + } + } +- read_unlock_irqrestore(&kmemleak_lock, flags); ++ raw_spin_unlock_irqrestore(&kmemleak_lock, flags); + } + + /* diff --git a/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch b/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch index 304909937..e91e433e5 100644 --- a/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch +++ b/debian/patches-rt/kthread-convert-worker-lock-to-raw-spinlock.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Fri, 28 Sep 2018 21:03:51 +0000 Subject: [PATCH] kthread: convert worker lock to raw spinlock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In order to enable the queuing of kthread work items from hardirq context even when PREEMPT_RT_FULL is enabled, convert the worker diff --git a/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch b/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch index bf360e33a..3023b9ebc 100644 --- a/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch +++ b/debian/patches-rt/leds-trigger-disable-CPU-trigger-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 23 Jan 2014 14:45:59 +0100 Subject: leds: trigger: disable CPU trigger on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz as it triggers: |CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.8-rt10 #141 diff --git a/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch b/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch index 4d8d1cc61..a389139f7 100644 --- a/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch +++ b/debian/patches-rt/list_bl-fixup-bogus-lockdep-warning.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Thu, 31 Mar 2016 00:04:25 -0500 Subject: [PATCH] list_bl: fixup bogus lockdep warning -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz At first glance, the use of 'static inline' seems appropriate for INIT_HLIST_BL_HEAD(). diff --git a/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch b/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch index 1c53bebf4..91690c768 100644 --- a/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch +++ b/debian/patches-rt/list_bl.h-make-list-head-locking-RT-safe.patch @@ -1,7 +1,7 @@ From: Paul Gortmaker Date: Fri, 21 Jun 2013 15:07:25 -0400 Subject: list_bl: Make list head locking RT safe -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz As per changes in include/linux/jbd_common.h for avoiding the bit_spin_locks on RT ("fs: jbd/jbd2: Make state lock and journal diff --git a/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch b/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch index 41e1967c8..e3440cc57 100644 --- a/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch +++ b/debian/patches-rt/locallock-provide-get-put-_locked_ptr-variants.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Mon, 7 May 2018 08:58:56 -0500 Subject: [PATCH] locallock: provide {get,put}_locked_ptr() variants -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Provide a set of locallocked accessors for pointers to per-CPU data; this is useful for dynamically-allocated per-CPU regions, for example. diff --git a/debian/patches-rt/localversion.patch b/debian/patches-rt/localversion.patch index 1cb115e21..83070d2bf 100644 --- a/debian/patches-rt/localversion.patch +++ b/debian/patches-rt/localversion.patch @@ -1,7 +1,7 @@ Subject: Add localversion for -RT release From: Thomas Gleixner Date: Fri, 08 Jul 2011 20:25:16 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Thomas Gleixner --- @@ -11,4 +11,4 @@ Signed-off-by: Thomas Gleixner --- /dev/null +++ b/localversion-rt @@ -0,0 +1 @@ -+-rt6 ++-rt8 diff --git a/debian/patches-rt/lockdep-disable-self-test.patch b/debian/patches-rt/lockdep-disable-self-test.patch index 543b80743..30d938f29 100644 --- a/debian/patches-rt/lockdep-disable-self-test.patch +++ b/debian/patches-rt/lockdep-disable-self-test.patch @@ -4,7 +4,7 @@ Subject: [PATCH] lockdep: disable self-test MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The self-test wasn't always 100% accurate for RT. We disabled a few tests which failed because they had a different semantic for RT. Some diff --git a/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch b/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch index 8f7eddfbf..e07b1d535 100644 --- a/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch +++ b/debian/patches-rt/lockdep-no-softirq-accounting-on-rt.patch @@ -1,7 +1,7 @@ Subject: lockdep: Make it RT aware From: Thomas Gleixner Date: Sun, 17 Jul 2011 18:51:23 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz teach lockdep that we don't really do softirqs on -RT. diff --git a/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch b/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch index e3c90cf32..6c2824da8 100644 --- a/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch +++ b/debian/patches-rt/lockdep-selftest-fix-warnings-due-to-missing-PREEMPT.patch @@ -1,7 +1,7 @@ From: Josh Cartwright Date: Wed, 28 Jan 2015 13:08:45 -0600 Subject: lockdep: selftest: fix warnings due to missing PREEMPT_RT conditionals -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz "lockdep: Selftest: Only do hardirq context test for raw spinlock" disabled the execution of certain tests with PREEMPT_RT_FULL, but did diff --git a/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch b/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch index 7b6dc16cd..dee1b04d0 100644 --- a/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch +++ b/debian/patches-rt/lockdep-selftest-only-do-hardirq-context-test-for-raw-spinlock.patch @@ -1,7 +1,7 @@ Subject: lockdep: selftest: Only do hardirq context test for raw spinlock From: Yong Zhang Date: Mon, 16 Apr 2012 15:01:56 +0800 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz From: Yong Zhang diff --git a/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch b/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch index 92e62effc..fadf5c9f4 100644 --- a/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch +++ b/debian/patches-rt/locking-don-t-check-for-__LINUX_SPINLOCK_TYPES_H-on-.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 4 Aug 2017 17:40:42 +0200 Subject: [PATCH 1/2] locking: don't check for __LINUX_SPINLOCK_TYPES_H on -RT archs -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Upstream uses arch_spinlock_t within spinlock_t and requests that spinlock_types.h header file is included first. diff --git a/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch b/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch index 8201ab24c..997987824 100644 --- a/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch +++ b/debian/patches-rt/locking-locktorture-Do-NOT-include-rwlock.h-directly.patch @@ -1,7 +1,7 @@ From: "Wolfgang M. Reimer" Date: Tue, 21 Jul 2015 16:20:07 +0200 Subject: locking: locktorture: Do NOT include rwlock.h directly -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Including rwlock.h directly will cause kernel builds to fail if CONFIG_PREEMPT_RT_FULL is defined. The correct header file diff --git a/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch b/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch index 8eee8d6ba..39005d935 100644 --- a/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch +++ b/debian/patches-rt/locking-rt-mutex-fix-deadlock-in-device-mapper-block.patch @@ -1,7 +1,7 @@ From: Mikulas Patocka Date: Mon, 13 Nov 2017 12:56:53 -0500 Subject: [PATCH] locking/rt-mutex: fix deadlock in device mapper / block-IO -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When some block device driver creates a bio and submits it to another block device driver, the bio is added to current->bio_list (in order to diff --git a/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch b/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch index cd30dc6d6..68bd560f7 100644 --- a/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch +++ b/debian/patches-rt/locking-rtmutex-re-init-the-wait_lock-in-rt_mutex_in.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 16 Nov 2017 16:48:48 +0100 Subject: [PATCH] locking/rtmutex: re-init the wait_lock in rt_mutex_init_proxy_locked() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz We could provide a key-class for the lockdep (and fixup all callers) or move the init to all callers (like it was) in order to avoid lockdep diff --git a/debian/patches-rt/md-disable-bcache.patch b/debian/patches-rt/md-disable-bcache.patch index ff880b49f..75b3e4346 100644 --- a/debian/patches-rt/md-disable-bcache.patch +++ b/debian/patches-rt/md-disable-bcache.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 29 Aug 2013 11:48:57 +0200 Subject: md: disable bcache -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz It uses anon semaphores |drivers/md/bcache/request.c: In function ‘cached_dev_write_complete’: diff --git a/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch b/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch index 1ef6125bb..0f2d72dab 100644 --- a/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch +++ b/debian/patches-rt/md-raid5-percpu-handling-rt-aware.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 6 Apr 2010 16:51:31 +0200 Subject: md: raid5: Make raid5_percpu handling RT aware -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz __raid_run_ops() disables preemption with get_cpu() around the access to the raid5_percpu variables. That causes scheduling while atomic diff --git a/debian/patches-rt/mips-disable-highmem-on-rt.patch b/debian/patches-rt/mips-disable-highmem-on-rt.patch index 2d63fcff2..4f0bbc912 100644 --- a/debian/patches-rt/mips-disable-highmem-on-rt.patch +++ b/debian/patches-rt/mips-disable-highmem-on-rt.patch @@ -1,7 +1,7 @@ Subject: mips: Disable highmem on RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 17:10:12 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The current highmem handling on -RT is not compatible and needs fixups. diff --git a/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch b/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch index 6c265476a..6456c5b56 100644 --- a/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch +++ b/debian/patches-rt/mm-convert-swap-to-percpu-locked.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:51 -0500 Subject: mm/swap: Convert to percpu locked -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Replace global locks (get_cpu + local_irq_save) with "local_locks()". Currently there is one of for "rotate" and one for "swap". @@ -53,7 +53,7 @@ Signed-off-by: Thomas Gleixner } --- a/mm/page_alloc.c +++ b/mm/page_alloc.c -@@ -7182,8 +7182,9 @@ void __init free_area_init(unsigned long +@@ -7184,8 +7184,9 @@ void __init free_area_init(unsigned long static int page_alloc_cpu_dead(unsigned int cpu) { diff --git a/debian/patches-rt/mm-disable-sloub-rt.patch b/debian/patches-rt/mm-disable-sloub-rt.patch index 1055a2a67..fe12455a3 100644 --- a/debian/patches-rt/mm-disable-sloub-rt.patch +++ b/debian/patches-rt/mm-disable-sloub-rt.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:44:03 -0500 Subject: mm: Allow only slub on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Disable SLAB and SLOB on -RT. Only SLUB is adopted to -RT needs. diff --git a/debian/patches-rt/mm-enable-slub.patch b/debian/patches-rt/mm-enable-slub.patch index b6520b5eb..365fbe14e 100644 --- a/debian/patches-rt/mm-enable-slub.patch +++ b/debian/patches-rt/mm-enable-slub.patch @@ -1,7 +1,7 @@ Subject: mm: Enable SLUB for RT From: Thomas Gleixner Date: Thu, 25 Oct 2012 10:32:35 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Avoid the memory allocation in IRQ section diff --git a/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch b/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch index 4a597430d..7380ef0ae 100644 --- a/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch +++ b/debian/patches-rt/mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch @@ -1,7 +1,7 @@ From: Clark Williams Date: Tue, 18 Sep 2018 10:29:31 -0500 Subject: [PATCH] mm/kasan: make quarantine_lock a raw_spinlock_t -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The static lock quarantine_lock is used in quarantine.c to protect the quarantine queue datastructures. It is taken inside quarantine queue diff --git a/debian/patches-rt/mm-make-vmstat-rt-aware.patch b/debian/patches-rt/mm-make-vmstat-rt-aware.patch index 84ad70d7c..b2be2f98a 100644 --- a/debian/patches-rt/mm-make-vmstat-rt-aware.patch +++ b/debian/patches-rt/mm-make-vmstat-rt-aware.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:30:13 -0500 Subject: mm/vmstat: Protect per cpu variables with preempt disable on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Disable preemption on -RT for the vmstat code. On vanila the code runs in IRQ-off regions while on -RT it is not. "preempt_disable" ensures that the diff --git a/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch b/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch index 4fa847ae7..3f4201ccb 100644 --- a/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch +++ b/debian/patches-rt/mm-memcontrol-Don-t-call-schedule_work_on-in-preempt.patch @@ -1,7 +1,7 @@ From: Yang Shi Subject: mm/memcontrol: Don't call schedule_work_on in preemption disabled context Date: Wed, 30 Oct 2013 11:48:33 -0700 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The following trace is triggered when running ltp oom test cases: diff --git a/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch b/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch index e7d70cad5..9bfcc4526 100644 --- a/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch +++ b/debian/patches-rt/mm-memcontrol-do_not_disable_irq.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Subject: mm/memcontrol: Replace local_irq_disable with local locks Date: Wed, 28 Jan 2015 17:14:16 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There are a few local_irq_disable() which then take sleeping locks. This patch converts them local locks. diff --git a/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch b/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch index 4e95e377f..ab8c5dc87 100644 --- a/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch +++ b/debian/patches-rt/mm-page_alloc-rt-friendly-per-cpu-pages.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:37 -0500 Subject: mm: page_alloc: rt-friendly per-cpu pages -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz rt-friendly per-cpu pages: convert the irqs-off per-cpu locking method into a preemptible, explicit-per-cpu-locks method. @@ -213,7 +213,7 @@ Signed-off-by: Thomas Gleixner return NULL; } -@@ -8068,7 +8091,7 @@ void zone_pcp_reset(struct zone *zone) +@@ -8070,7 +8093,7 @@ void zone_pcp_reset(struct zone *zone) struct per_cpu_pageset *pset; /* avoid races with drain_pages() */ @@ -222,7 +222,7 @@ Signed-off-by: Thomas Gleixner if (zone->pageset != &boot_pageset) { for_each_online_cpu(cpu) { pset = per_cpu_ptr(zone->pageset, cpu); -@@ -8077,7 +8100,7 @@ void zone_pcp_reset(struct zone *zone) +@@ -8079,7 +8102,7 @@ void zone_pcp_reset(struct zone *zone) free_percpu(zone->pageset); zone->pageset = &boot_pageset; } diff --git a/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch b/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch index dac286d8f..e00551d5e 100644 --- a/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch +++ b/debian/patches-rt/mm-perform-lru_add_drain_all-remotely.patch @@ -1,7 +1,7 @@ From: Luiz Capitulino Date: Fri, 27 May 2016 15:03:28 +0200 Subject: [PATCH] mm: perform lru_add_drain_all() remotely -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz lru_add_drain_all() works by scheduling lru_add_drain_cpu() to run on all CPUs that have non-empty LRU pagevecs and then waiting for diff --git a/debian/patches-rt/mm-protect-activate-switch-mm.patch b/debian/patches-rt/mm-protect-activate-switch-mm.patch index 5436260f4..71e0185f5 100644 --- a/debian/patches-rt/mm-protect-activate-switch-mm.patch +++ b/debian/patches-rt/mm-protect-activate-switch-mm.patch @@ -1,7 +1,7 @@ From: Yong Zhang Date: Tue, 15 May 2012 13:53:56 +0800 Subject: mm: Protect activate_mm() by preempt_[disable&enable]_rt() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz User preempt_*_rt instead of local_irq_*_rt or otherwise there will be warning on ARM like below: diff --git a/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch b/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch index f1246c207..cf44f57a0 100644 --- a/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch +++ b/debian/patches-rt/mm-rt-kmap-atomic-scheduling.patch @@ -1,7 +1,7 @@ Subject: mm, rt: kmap_atomic scheduling From: Peter Zijlstra Date: Thu, 28 Jul 2011 10:43:51 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In fact, with migrate_disable() existing one could play games with kmap_atomic. You could save/restore the kmap_atomic slots on context diff --git a/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch b/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch index 2a3946921..513ca0247 100644 --- a/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch +++ b/debian/patches-rt/mm-scatterlist-dont-disable-irqs-on-RT.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 3 Jul 2009 08:44:34 -0500 Subject: mm/scatterlist: Do not disable irqs on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz For -RT it is enough to keep pagefault disabled (which is currently handled by kmap_atomic()). diff --git a/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch b/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch index 00ee45ad1..0ea2f09de 100644 --- a/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch +++ b/debian/patches-rt/mm-vmalloc-use-get-cpu-light.patch @@ -1,7 +1,7 @@ Subject: mm/vmalloc: Another preempt disable region which sucks From: Thomas Gleixner Date: Tue, 12 Jul 2011 11:39:36 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Avoid the preempt disable version of get_cpu_var(). The inner-lock should provide enough serialisation. diff --git a/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch b/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch index 4fd7bf7c1..28e123363 100644 --- a/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch +++ b/debian/patches-rt/mm_zsmalloc_copy_with_get_cpu_var_and_locking.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Tue, 22 Mar 2016 11:16:09 +0100 Subject: [PATCH] mm/zsmalloc: copy with get_cpu_var() and locking -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz get_cpu_var() disables preemption and triggers a might_sleep() splat later. This is replaced with get_locked_var(). diff --git a/debian/patches-rt/mutex-no-spin-on-rt.patch b/debian/patches-rt/mutex-no-spin-on-rt.patch index ae9e8adb8..934a969d4 100644 --- a/debian/patches-rt/mutex-no-spin-on-rt.patch +++ b/debian/patches-rt/mutex-no-spin-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:51:45 +0200 Subject: locking: Disable spin on owner for RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Drop spin on owner for mutex / rwsem. We are most likely not using it but… diff --git a/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch b/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch index d9302160d..9921264c4 100644 --- a/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch +++ b/debian/patches-rt/net-Have-__napi_schedule_irqoff-disable-interrupts-o.patch @@ -2,7 +2,7 @@ From: Steven Rostedt Date: Tue, 6 Dec 2016 17:50:30 -0500 Subject: [PATCH] net: Have __napi_schedule_irqoff() disable interrupts on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz A customer hit a crash where the napi sd->poll_list became corrupted. The customer had the bnx2x driver, which does a @@ -51,7 +51,7 @@ Signed-off-by: Sebastian Andrzej Siewior { --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -5931,6 +5931,7 @@ bool napi_schedule_prep(struct napi_stru +@@ -5936,6 +5936,7 @@ bool napi_schedule_prep(struct napi_stru } EXPORT_SYMBOL(napi_schedule_prep); @@ -59,7 +59,7 @@ Signed-off-by: Sebastian Andrzej Siewior /** * __napi_schedule_irqoff - schedule for receive * @n: entry to schedule -@@ -5942,6 +5943,7 @@ void __napi_schedule_irqoff(struct napi_ +@@ -5947,6 +5948,7 @@ void __napi_schedule_irqoff(struct napi_ ____napi_schedule(this_cpu_ptr(&softnet_data), n); } EXPORT_SYMBOL(__napi_schedule_irqoff); diff --git a/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch b/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch index 81f1a4740..c01142849 100644 --- a/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch +++ b/debian/patches-rt/net-Qdisc-use-a-seqlock-instead-seqcount.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 14 Sep 2016 17:36:35 +0200 Subject: [PATCH] net/Qdisc: use a seqlock instead seqcount -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The seqcount disables preemption on -RT while it is held which can't remove. Also we don't want the reader to spin for ages if the writer is diff --git a/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch b/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch index a91e3b698..758021480 100644 --- a/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch +++ b/debian/patches-rt/net-add-a-lock-around-icmp_sk.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 31 Aug 2016 17:54:09 +0200 Subject: [PATCH] net: add a lock around icmp_sk() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz It looks like the this_cpu_ptr() access in icmp_sk() is protected with local_bh_disable(). To avoid missing serialization in -RT I am adding diff --git a/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch b/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch index 24ce37533..20fb5c4bc 100644 --- a/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch +++ b/debian/patches-rt/net-add-back-the-missing-serialization-in-ip_send_un.patch @@ -5,7 +5,7 @@ Subject: [PATCH] net: add back the missing serialization in MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Some time ago Sami Pietikäinen reported a crash on -RT in ip_send_unicast_reply() which was later fixed by Nicholas Mc Guire diff --git a/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch b/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch index 175e853d3..5a2fb77f4 100644 --- a/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch +++ b/debian/patches-rt/net-another-local-irq-disable-alloc-atomic-headache.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Wed, 26 Sep 2012 16:21:08 +0200 Subject: net: Another local_irq_disable/kmalloc headache -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Replace it by a local lock. Though that's pretty inefficient :( diff --git a/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch b/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch index 2ffe2a4c7..c05fffe02 100644 --- a/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch +++ b/debian/patches-rt/net-core-protect-users-of-napi_alloc_cache-against-r.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 15 Jan 2016 16:33:34 +0100 Subject: net/core: protect users of napi_alloc_cache against reentrance -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On -RT the code running in BH can not be moved to another CPU so CPU local variable remain local. However the code can be preempted diff --git a/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch b/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch index 40c5ee368..d1259b7f0 100644 --- a/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch +++ b/debian/patches-rt/net-core-use-local_bh_disable-in-netif_rx_ni.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 16 Jun 2017 19:03:16 +0200 Subject: [PATCH] net/core: use local_bh_disable() in netif_rx_ni() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In 2004 netif_rx_ni() gained a preempt_disable() section around netif_rx() and its do_softirq() + testing for it. The do_softirq() part @@ -19,7 +19,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -4507,11 +4507,9 @@ int netif_rx_ni(struct sk_buff *skb) +@@ -4512,11 +4512,9 @@ int netif_rx_ni(struct sk_buff *skb) trace_netif_rx_ni_entry(skb); diff --git a/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch b/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch index 86e76f18a..bff1b6d7e 100644 --- a/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch +++ b/debian/patches-rt/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 30 Mar 2016 13:36:29 +0200 Subject: [PATCH] net: dev: always take qdisc's busylock in __dev_xmit_skb() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The root-lock is dropped before dev_hard_start_xmit() is invoked and after setting the __QDISC___STATE_RUNNING bit. If this task is now pushed away @@ -21,7 +21,7 @@ Signed-off-by: Sebastian Andrzej Siewior --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -3446,7 +3446,11 @@ static inline int __dev_xmit_skb(struct +@@ -3451,7 +3451,11 @@ static inline int __dev_xmit_skb(struct * This permits qdisc->running owner to get the lock more * often and dequeue packets faster. */ diff --git a/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch b/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch index d3907bcc4..b9c2babdd 100644 --- a/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch +++ b/debian/patches-rt/net-fix-iptable-xt-write-recseq-begin-rt-fallout.patch @@ -1,7 +1,7 @@ Subject: net: netfilter: Serialize xt_write_recseq sections on RT From: Thomas Gleixner Date: Sun, 28 Oct 2012 11:18:08 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The netfilter code relies only on the implicit semantics of local_bh_disable() for serializing wt_write_recseq sections. RT breaks diff --git a/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch b/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch index c4bcccef9..44bf70478 100644 --- a/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch +++ b/debian/patches-rt/net-make-devnet_rename_seq-a-mutex.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 20 Mar 2013 18:06:20 +0100 Subject: net: Add a mutex around devnet_rename_seq -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On RT write_seqcount_begin() disables preemption and device_rename() allocates memory with GFP_KERNEL and grabs later the sysfs_mutex diff --git a/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch b/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch index 46e2946a6..70c2452d1 100644 --- a/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch +++ b/debian/patches-rt/net-move-xmit_recursion-to-per-task-variable-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 13 Jan 2016 15:55:02 +0100 Subject: net: move xmit_recursion to per-task variable on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz A softirq on -RT can be preempted. That means one task is in __dev_queue_xmit(), gets preempted and another task may enter @@ -194,7 +194,7 @@ Signed-off-by: Sebastian Andrzej Siewior struct task_struct *oom_reaper_list; --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -3518,8 +3518,10 @@ static void skb_update_prio(struct sk_bu +@@ -3523,8 +3523,10 @@ static void skb_update_prio(struct sk_bu #define skb_update_prio(skb) #endif @@ -205,7 +205,7 @@ Signed-off-by: Sebastian Andrzej Siewior /** * dev_loopback_xmit - loop back @skb -@@ -3810,9 +3812,12 @@ static int __dev_queue_xmit(struct sk_bu +@@ -3815,9 +3817,12 @@ static int __dev_queue_xmit(struct sk_bu if (dev->flags & IFF_UP) { int cpu = smp_processor_id(); /* ok because BHs are off */ @@ -220,7 +220,7 @@ Signed-off-by: Sebastian Andrzej Siewior goto recursion_alert; skb = validate_xmit_skb(skb, dev, &again); -@@ -3822,9 +3827,9 @@ static int __dev_queue_xmit(struct sk_bu +@@ -3827,9 +3832,9 @@ static int __dev_queue_xmit(struct sk_bu HARD_TX_LOCK(dev, txq, cpu); if (!netif_xmit_stopped(txq)) { @@ -232,7 +232,7 @@ Signed-off-by: Sebastian Andrzej Siewior if (dev_xmit_complete(rc)) { HARD_TX_UNLOCK(dev, txq); goto out; -@@ -8367,7 +8372,7 @@ static void netdev_init_one_queue(struct +@@ -8372,7 +8377,7 @@ static void netdev_init_one_queue(struct /* Initialize queue lock */ spin_lock_init(&queue->_xmit_lock); netdev_set_xmit_lockdep_class(&queue->_xmit_lock, dev->type); diff --git a/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch b/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch index 4982e3253..05e8c7fd4 100644 --- a/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch +++ b/debian/patches-rt/net-provide-a-way-to-delegate-processing-a-softirq-t.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 20 Jan 2016 15:39:05 +0100 Subject: net: provide a way to delegate processing a softirq to ksoftirqd -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz If the NET_RX uses up all of his budget it moves the following NAPI invocations into the `ksoftirqd`. On -RT it does not do so. Instead it @@ -68,7 +68,7 @@ Signed-off-by: Sebastian Andrzej Siewior void raise_softirq_irqoff(unsigned int nr) --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -6361,7 +6361,7 @@ static __latent_entropy void net_rx_acti +@@ -6366,7 +6366,7 @@ static __latent_entropy void net_rx_acti list_splice_tail(&repoll, &list); list_splice(&list, &sd->poll_list); if (!list_empty(&sd->poll_list)) diff --git a/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch b/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch index 784a6efbf..913ea6785 100644 --- a/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch +++ b/debian/patches-rt/net-sched-dev_deactivate_many-use-msleep-1-instead-o.patch @@ -1,7 +1,7 @@ From: Marc Kleine-Budde Date: Wed, 5 Mar 2014 00:49:47 +0100 Subject: net: sched: Use msleep() instead of yield() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On PREEMPT_RT enabled systems the interrupt handler run as threads at prio 50 (by default). If a high priority userspace process tries to shut down a busy diff --git a/debian/patches-rt/net-use-cpu-chill.patch b/debian/patches-rt/net-use-cpu-chill.patch index 97a839786..02e53b0d5 100644 --- a/debian/patches-rt/net-use-cpu-chill.patch +++ b/debian/patches-rt/net-use-cpu-chill.patch @@ -1,7 +1,7 @@ Subject: net: Use cpu_chill() instead of cpu_relax() From: Thomas Gleixner Date: Wed, 07 Mar 2012 21:10:04 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Use cpu_chill() instead of cpu_relax() to let the system diff --git a/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch b/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch index 14ace0d09..f76ef26bb 100644 --- a/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch +++ b/debian/patches-rt/net_disable_NET_RX_BUSY_POLL.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Sat, 27 May 2017 19:02:06 +0200 Subject: net/core: disable NET_RX_BUSY_POLL -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz sk_busy_loop() does preempt_disable() followed by a few operations which can take sleeping locks and may get long. diff --git a/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch b/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch index 93abfbcd1..ed2fecbb4 100644 --- a/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch +++ b/debian/patches-rt/of-allocate-free-phandle-cache-outside-of-the-devtre.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 31 Aug 2018 14:16:30 +0200 Subject: [PATCH] of: allocate / free phandle cache outside of the devtree_lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The phandle cache code allocates memory while holding devtree_lock which is a raw_spinlock_t. Memory allocation (and free()) is not possible on diff --git a/debian/patches-rt/oleg-signal-rt-fix.patch b/debian/patches-rt/oleg-signal-rt-fix.patch index c0fc75e67..07d966f9b 100644 --- a/debian/patches-rt/oleg-signal-rt-fix.patch +++ b/debian/patches-rt/oleg-signal-rt-fix.patch @@ -1,7 +1,7 @@ From: Oleg Nesterov Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: signal/x86: Delay calling signals in atomic -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On x86_64 we must disable preemption before we enable interrupts for stack faults, int3 and debugging, because the current task is using diff --git a/debian/patches-rt/panic-disable-random-on-rt.patch b/debian/patches-rt/panic-disable-random-on-rt.patch index dec66b740..e2ff1ffdf 100644 --- a/debian/patches-rt/panic-disable-random-on-rt.patch +++ b/debian/patches-rt/panic-disable-random-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: panic: skip get_random_bytes for RT_FULL in init_oops_id -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Disable on -RT. If this is invoked from irq-context we will have problems to acquire the sleeping lock. diff --git a/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch b/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch index 1d488367e..5b956d6f7 100644 --- a/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch +++ b/debian/patches-rt/patch-to-introduce-rcu-bh-qs-where-safe-from-softirq.patch @@ -1,7 +1,7 @@ Subject: rcu: Make ksoftirqd do RCU quiescent states From: "Paul E. McKenney" Date: Wed, 5 Oct 2011 11:45:18 -0700 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Implementing RCU-bh in terms of RCU-preempt makes the system vulnerable to network-based denial-of-service attacks. This patch therefore diff --git a/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch b/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch index 11da57c4a..f650db512 100644 --- a/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch +++ b/debian/patches-rt/pci-switchtec-Don-t-use-completion-s-wait-queue.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 4 Oct 2017 10:24:23 +0200 Subject: [PATCH] pci/switchtec: Don't use completion's wait queue -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The poll callback is using completion's wait_queue_head_t member and puts it in poll_wait() so the poll() caller gets a wakeup after command diff --git a/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch b/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch index c8bf7a9ac..c1fb8cd99 100644 --- a/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch +++ b/debian/patches-rt/percpu-include-irqflags.h-for-raw_local_irq_save.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 11 Oct 2018 16:39:59 +0200 Subject: [PATCH] percpu: include irqflags.h for raw_local_irq_save() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The header percpu.h header file is using raw_local_irq_save() but does not include irqflags.h for its definition. It compiles because the diff --git a/debian/patches-rt/perf-x86-intel-Delay-memory-deallocation-until-cpu_d.patch b/debian/patches-rt/perf-x86-intel-Delay-memory-deallocation-until-cpu_d.patch new file mode 100644 index 000000000..32ce0d1cd --- /dev/null +++ b/debian/patches-rt/perf-x86-intel-Delay-memory-deallocation-until-cpu_d.patch @@ -0,0 +1,74 @@ +From: Peter Zijlstra +Date: Wed, 19 Dec 2018 16:46:44 +0100 +Subject: [PATCH] perf/x86/intel: Delay memory deallocation until cpu_dead +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz + +intel_pmu_cpu_prepare() allocated memory for ->shared_regs among other +members of struct cpu_hw_events. This memory is released in +intel_pmu_cpu_dying() which is wrong. The counterpart of the +intel_pmu_cpu_prepare() callback is x86_pmu_dead_cpu(). + +Otherwise if the CPU fails on the UP path between CPUHP_PERF_X86_PREPARE +and CPUHP_AP_PERF_X86_STARTING then it won't release the memory but +allocate new memory on the next attempt to online the CPU (leaking the +old memory). +Also, if the CPU down path fails between CPUHP_AP_PERF_X86_STARTING and +CPUHP_PERF_X86_PREPARE then the CPU will go back online but never +allocate the memory that was released in x86_pmu_dying_cpu(). + +Make the memory allocation/free symmetrical in regard to the CPU hotplug +notifier by moving the deallocation to intel_pmu_cpu_dead(). + +This started in commit + a7e3ed1e47011 ("perf: Add support for supplementary event registers"). + +Cc: stable@vger.kernel.org +Reported-by: He Zhe +Fixes: a7e3ed1e47011 ("perf: Add support for supplementary event registers"). +Signed-off-by: Peter Zijlstra (Intel) +[bigeasy: patch description] +Signed-off-by: Sebastian Andrzej Siewior +--- + arch/x86/events/intel/core.c | 10 ++++++++-- + 1 file changed, 8 insertions(+), 2 deletions(-) + +--- a/arch/x86/events/intel/core.c ++++ b/arch/x86/events/intel/core.c +@@ -3440,6 +3440,11 @@ static void free_excl_cntrs(int cpu) + + static void intel_pmu_cpu_dying(int cpu) + { ++ fini_debug_store_on_cpu(cpu); ++} ++ ++static void intel_pmu_cpu_dead(int cpu) ++{ + struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu); + struct intel_shared_regs *pc; + +@@ -3451,8 +3456,6 @@ static void intel_pmu_cpu_dying(int cpu) + } + + free_excl_cntrs(cpu); +- +- fini_debug_store_on_cpu(cpu); + } + + static void intel_pmu_sched_task(struct perf_event_context *ctx, +@@ -3541,6 +3544,7 @@ static __initconst const struct x86_pmu + .cpu_prepare = intel_pmu_cpu_prepare, + .cpu_starting = intel_pmu_cpu_starting, + .cpu_dying = intel_pmu_cpu_dying, ++ .cpu_dead = intel_pmu_cpu_dead, + }; + + static struct attribute *intel_pmu_attrs[]; +@@ -3581,6 +3585,8 @@ static __initconst const struct x86_pmu + .cpu_prepare = intel_pmu_cpu_prepare, + .cpu_starting = intel_pmu_cpu_starting, + .cpu_dying = intel_pmu_cpu_dying, ++ .cpu_dead = intel_pmu_cpu_dead, ++ + .guest_get_msrs = intel_guest_get_msrs, + .sched_task = intel_pmu_sched_task, + }; diff --git a/debian/patches-rt/peter_zijlstra-frob-rcu.patch b/debian/patches-rt/peter_zijlstra-frob-rcu.patch index 8c757e831..0d8ad3d69 100644 --- a/debian/patches-rt/peter_zijlstra-frob-rcu.patch +++ b/debian/patches-rt/peter_zijlstra-frob-rcu.patch @@ -1,7 +1,7 @@ Subject: rcu: Frob softirq test From: Peter Zijlstra Date: Sat Aug 13 00:23:17 CEST 2011 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz With RT_FULL we get the below wreckage: diff --git a/debian/patches-rt/peterz-percpu-rwsem-rt.patch b/debian/patches-rt/peterz-percpu-rwsem-rt.patch index 880b64f74..d24d60fdb 100644 --- a/debian/patches-rt/peterz-percpu-rwsem-rt.patch +++ b/debian/patches-rt/peterz-percpu-rwsem-rt.patch @@ -1,7 +1,7 @@ Subject: locking/percpu-rwsem: Remove preempt_disable variants From: Peter Zijlstra Date: Wed Nov 23 16:29:32 CET 2016 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Effective revert commit: diff --git a/debian/patches-rt/pid.h-include-atomic.h.patch b/debian/patches-rt/pid.h-include-atomic.h.patch index 10db59afb..8a37cef56 100644 --- a/debian/patches-rt/pid.h-include-atomic.h.patch +++ b/debian/patches-rt/pid.h-include-atomic.h.patch @@ -1,7 +1,7 @@ From: Grygorii Strashko Date: Tue, 21 Jul 2015 19:43:56 +0300 Subject: pid.h: include atomic.h -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz This patch fixes build error: CC kernel/pid_namespace.o diff --git a/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch b/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch index 62c0100d9..d8b17dc95 100644 --- a/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch +++ b/debian/patches-rt/pinctrl-bcm2835-Use-raw-spinlock-for-RT-compatibilit.patch @@ -1,7 +1,7 @@ From: Lukas Wunner Date: Sat, 27 Oct 2018 10:15:33 +0200 Subject: [PATCH] pinctrl: bcm2835: Use raw spinlock for RT compatibility -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz [Upstream commit 71dfaa749f2f7c1722ebf6716d3f797a04528cba] diff --git a/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch b/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch index bf2a323a6..898a4e471 100644 --- a/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch +++ b/debian/patches-rt/posix-timers-thread-posix-cpu-timers-on-rt.patch @@ -1,7 +1,7 @@ From: John Stultz Date: Fri, 3 Jul 2009 08:29:58 -0500 Subject: posix-timers: Thread posix-cpu-timers on -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz posix-cpu-timer code takes non -rt safe locks in hard irq context. Move it to a thread. diff --git a/debian/patches-rt/power-disable-highmem-on-rt.patch b/debian/patches-rt/power-disable-highmem-on-rt.patch index 0acc6b595..dd525e8d3 100644 --- a/debian/patches-rt/power-disable-highmem-on-rt.patch +++ b/debian/patches-rt/power-disable-highmem-on-rt.patch @@ -1,7 +1,7 @@ Subject: powerpc: Disable highmem on RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 17:08:34 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The current highmem handling on -RT is not compatible and needs fixups. diff --git a/debian/patches-rt/power-use-generic-rwsem-on-rt.patch b/debian/patches-rt/power-use-generic-rwsem-on-rt.patch index 99084ba0c..0d49bef24 100644 --- a/debian/patches-rt/power-use-generic-rwsem-on-rt.patch +++ b/debian/patches-rt/power-use-generic-rwsem-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: powerpc: Use generic rwsem on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Use generic code which uses rtmutex diff --git a/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch b/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch index ffd0a8ffe..a36dc29dc 100644 --- a/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch +++ b/debian/patches-rt/powerpc-kvm-Disable-in-kernel-MPIC-emulation-for-PRE.patch @@ -1,7 +1,7 @@ From: Bogdan Purcareata Date: Fri, 24 Apr 2015 15:53:13 +0000 Subject: powerpc/kvm: Disable in-kernel MPIC emulation for PREEMPT_RT_FULL -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz While converting the openpic emulation code to use a raw_spinlock_t enables guests to run on RT, there's still a performance issue. For interrupts sent in diff --git a/debian/patches-rt/powerpc-preempt-lazy-support.patch b/debian/patches-rt/powerpc-preempt-lazy-support.patch index e1b250b42..f128483db 100644 --- a/debian/patches-rt/powerpc-preempt-lazy-support.patch +++ b/debian/patches-rt/powerpc-preempt-lazy-support.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 1 Nov 2012 10:14:11 +0100 Subject: powerpc: Add support for lazy preemption -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Implement the powerpc pieces for lazy preempt. diff --git a/debian/patches-rt/preempt-lazy-support.patch b/debian/patches-rt/preempt-lazy-support.patch index f34bf3164..9b223a71e 100644 --- a/debian/patches-rt/preempt-lazy-support.patch +++ b/debian/patches-rt/preempt-lazy-support.patch @@ -1,7 +1,7 @@ Subject: sched: Add support for lazy preemption From: Thomas Gleixner Date: Fri, 26 Oct 2012 18:50:54 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz It has become an obsession to mitigate the determinism vs. throughput loss of RT. Looking at the mainline semantics of preemption points diff --git a/debian/patches-rt/preempt-nort-rt-variants.patch b/debian/patches-rt/preempt-nort-rt-variants.patch index 59575a069..59b072c5f 100644 --- a/debian/patches-rt/preempt-nort-rt-variants.patch +++ b/debian/patches-rt/preempt-nort-rt-variants.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 24 Jul 2009 12:38:56 +0200 Subject: preempt: Provide preempt_*_(no)rt variants -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz RT needs a few preempt_disable/enable points which are not necessary otherwise. Implement variants to avoid #ifdeffery. diff --git a/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch b/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch index 9336b4074..844768b12 100644 --- a/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch +++ b/debian/patches-rt/printk-27force_early_printk-27-boot-param-to-help-with-debugging.patch @@ -1,7 +1,7 @@ Subject: printk: Add "force_early_printk" boot param to help with debugging From: Peter Zijlstra Date: Fri, 02 Sep 2011 14:41:29 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Gives me an option to screw printk and actually see what the machine says. diff --git a/debian/patches-rt/printk-kill.patch b/debian/patches-rt/printk-kill.patch index 85bb506ab..edc5a63ee 100644 --- a/debian/patches-rt/printk-kill.patch +++ b/debian/patches-rt/printk-kill.patch @@ -1,7 +1,7 @@ Subject: printk: Add a printk kill switch From: Ingo Molnar Date: Fri, 22 Jul 2011 17:58:40 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Add a prinkt-kill-switch. This is used from (NMI) watchdog to ensure that it does not dead-lock with the early printk code. diff --git a/debian/patches-rt/printk-rt-aware.patch b/debian/patches-rt/printk-rt-aware.patch index 45a540ab2..e4a987d42 100644 --- a/debian/patches-rt/printk-rt-aware.patch +++ b/debian/patches-rt/printk-rt-aware.patch @@ -1,7 +1,7 @@ Subject: printk: Make rt aware From: Thomas Gleixner Date: Wed, 19 Sep 2012 14:50:37 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Drop the lock before calling the console driver and do not disable interrupts while printing to a serial console. diff --git a/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch b/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch index e008fcdef..3e48b3068 100644 --- a/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch +++ b/debian/patches-rt/ptrace-fix-ptrace-vs-tasklist_lock-race.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 29 Aug 2013 18:21:04 +0200 Subject: ptrace: fix ptrace vs tasklist_lock race -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz As explained by Alexander Fyodorov : diff --git a/debian/patches-rt/radix-tree-use-local-locks.patch b/debian/patches-rt/radix-tree-use-local-locks.patch index 44f08b4a4..50f6065a4 100644 --- a/debian/patches-rt/radix-tree-use-local-locks.patch +++ b/debian/patches-rt/radix-tree-use-local-locks.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 25 Jan 2017 16:34:27 +0100 Subject: [PATCH] radix-tree: use local locks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The preload functionality uses per-CPU variables and preempt-disable to ensure that it does not switch CPUs during its usage. This patch adds diff --git a/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch b/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch index 4c492b717..d956cd74d 100644 --- a/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch +++ b/debian/patches-rt/random-avoid-preempt_disable-ed-section.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 12 May 2017 15:46:17 +0200 Subject: [PATCH] random: avoid preempt_disable()ed section -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz extract_crng() will use sleeping locks while in a preempt_disable() section due to get_cpu_var(). diff --git a/debian/patches-rt/random-make-it-work-on-rt.patch b/debian/patches-rt/random-make-it-work-on-rt.patch index 25bfeb9e7..5a6706a58 100644 --- a/debian/patches-rt/random-make-it-work-on-rt.patch +++ b/debian/patches-rt/random-make-it-work-on-rt.patch @@ -1,7 +1,7 @@ Subject: random: Make it work on rt From: Thomas Gleixner Date: Tue, 21 Aug 2012 20:38:50 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Delegate the random insertion to the forced threaded interrupt handler. Store the return IP of the hard interrupt handler in the irq diff --git a/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch b/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch index 18dd7ce90..c4d0e9f8f 100644 --- a/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch +++ b/debian/patches-rt/rcu-Eliminate-softirq-processing-from-rcutree.patch @@ -1,7 +1,7 @@ From: "Paul E. McKenney" Date: Mon, 4 Nov 2013 13:21:10 -0800 Subject: rcu: Eliminate softirq processing from rcutree -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Running RCU out of softirq is a problem for some workloads that would like to manage RCU core processing independently of other softirq work, diff --git a/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch b/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch index 3f25087c7..95ec4eaac 100644 --- a/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch +++ b/debian/patches-rt/rcu-disable-rcu-fast-no-hz-on-rt.patch @@ -1,7 +1,7 @@ Subject: rcu: Disable RCU_FAST_NO_HZ on RT From: Thomas Gleixner Date: Sun, 28 Oct 2012 13:26:09 +0000 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz This uses a timer_list timer from the irq disabled guts of the idle code. Disable it for now to prevent wreckage. diff --git a/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch b/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch index 605a14658..db1f5bd94 100644 --- a/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch +++ b/debian/patches-rt/rcu-enable-rcu_normal_after_boot-by-default-for-RT.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Wed, 12 Oct 2016 11:21:14 -0500 Subject: [PATCH] rcu: enable rcu_normal_after_boot by default for RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The forcing of an expedited grace period is an expensive and very RT-application unfriendly operation, as it forcibly preempts all running diff --git a/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch b/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch index b46c7e4e6..151f2676f 100644 --- a/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch +++ b/debian/patches-rt/rcu-make-RCU_BOOST-default-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 21 Mar 2014 20:19:05 +0100 Subject: rcu: make RCU_BOOST default on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Since it is no longer invoked from the softirq people run into OOM more often if the priority of the RCU thread is too low. Making boosting diff --git a/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch b/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch index 26f69f2db..245a8c19a 100644 --- a/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch +++ b/debian/patches-rt/rcu-merge-rcu-bh-into-rcu-preempt-for-rt.patch @@ -1,7 +1,7 @@ Subject: rcu: Merge RCU-bh into RCU-preempt Date: Wed, 5 Oct 2011 11:59:38 -0700 From: Thomas Gleixner -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The Linux kernel has long RCU-bh read-side critical sections that intolerably increase scheduling latency under mainline's RCU-bh rules, diff --git a/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch b/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch index 5c3c7524a..2e9cf4065 100644 --- a/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch +++ b/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch @@ -1,7 +1,7 @@ Subject: ARM: Initialize split page table locks for vector page From: Frank Rowand Date: Sat, 1 Oct 2011 18:58:13 -0700 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Without this patch, ARM can not use SPLIT_PTLOCK_CPUS if PREEMPT_RT_FULL=y because vectors_user_mapping() creates a diff --git a/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch b/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch index 1d4191f12..e0680b46d 100644 --- a/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch +++ b/debian/patches-rt/rt-Increase-decrease-the-nr-of-migratory-tasks-when-.patch @@ -1,7 +1,7 @@ From: Daniel Bristot de Oliveira Date: Mon, 26 Jun 2017 17:07:15 +0200 Subject: rt: Increase/decrease the nr of migratory tasks when enabling/disabling migration -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There is a problem in the migrate_disable()/enable() implementation regarding the number of migratory tasks in the rt/dl RQs. The problem diff --git a/debian/patches-rt/rt-introduce-cpu-chill.patch b/debian/patches-rt/rt-introduce-cpu-chill.patch index 3aff5c61c..70f12f36a 100644 --- a/debian/patches-rt/rt-introduce-cpu-chill.patch +++ b/debian/patches-rt/rt-introduce-cpu-chill.patch @@ -1,7 +1,7 @@ Subject: rt: Introduce cpu_chill() From: Thomas Gleixner Date: Wed, 07 Mar 2012 20:51:03 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Retry loops on RT might loop forever when the modifying side was preempted. Add cpu_chill() to replace cpu_relax(). cpu_chill() diff --git a/debian/patches-rt/rt-local-irq-lock.patch b/debian/patches-rt/rt-local-irq-lock.patch index 782a2ac00..60668f8af 100644 --- a/debian/patches-rt/rt-local-irq-lock.patch +++ b/debian/patches-rt/rt-local-irq-lock.patch @@ -1,7 +1,7 @@ Subject: rt: Add local irq locks From: Thomas Gleixner Date: Mon, 20 Jun 2011 09:03:47 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Introduce locallock. For !RT this maps to preempt_disable()/ local_irq_disable() so there is not much that changes. For RT this will diff --git a/debian/patches-rt/rt-preempt-base-config.patch b/debian/patches-rt/rt-preempt-base-config.patch index bfedf6d3e..99dad099a 100644 --- a/debian/patches-rt/rt-preempt-base-config.patch +++ b/debian/patches-rt/rt-preempt-base-config.patch @@ -1,7 +1,7 @@ Subject: rt: Provide PREEMPT_RT_BASE config switch From: Thomas Gleixner Date: Fri, 17 Jun 2011 12:39:57 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Introduce PREEMPT_RT_BASE which enables parts of PREEMPT_RT_FULL. Forces interrupt threading and enables some of the RT diff --git a/debian/patches-rt/rt-serial-warn-fix.patch b/debian/patches-rt/rt-serial-warn-fix.patch index e6d6bbd5a..2f311d3fd 100644 --- a/debian/patches-rt/rt-serial-warn-fix.patch +++ b/debian/patches-rt/rt-serial-warn-fix.patch @@ -1,7 +1,7 @@ Subject: rt: Improve the serial console PASS_LIMIT From: Ingo Molnar Date: Wed Dec 14 13:05:54 CET 2011 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Beyond the warning: diff --git a/debian/patches-rt/rtmutex-Make-lock_killable-work.patch b/debian/patches-rt/rtmutex-Make-lock_killable-work.patch index cc8698131..043d22a74 100644 --- a/debian/patches-rt/rtmutex-Make-lock_killable-work.patch +++ b/debian/patches-rt/rtmutex-Make-lock_killable-work.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sat, 1 Apr 2017 12:50:59 +0200 Subject: [PATCH] rtmutex: Make lock_killable work -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Locking an rt mutex killable does not work because signal handling is restricted to TASK_INTERRUPTIBLE. diff --git a/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch b/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch index 2667a4e3f..149861aca 100644 --- a/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch +++ b/debian/patches-rt/rtmutex-Provide-rt_mutex_slowlock_locked.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 16:14:22 +0200 Subject: rtmutex: Provide rt_mutex_slowlock_locked() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz This is the inner-part of rt_mutex_slowlock(), required for rwsem-rt. diff --git a/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch b/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch index de0f0b186..45b9e0e8e 100644 --- a/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch +++ b/debian/patches-rt/rtmutex-add-mutex-implementation-based-on-rtmutex.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:17:03 +0200 Subject: rtmutex: add mutex implementation based on rtmutex -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch b/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch index 6d3798a41..5e7a67972 100644 --- a/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch +++ b/debian/patches-rt/rtmutex-add-rwlock-implementation-based-on-rtmutex.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:18:06 +0200 Subject: rtmutex: add rwlock implementation based on rtmutex -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The implementation is bias-based, similar to the rwsem implementation. diff --git a/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch b/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch index 718d812d8..8faf42b87 100644 --- a/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch +++ b/debian/patches-rt/rtmutex-add-rwsem-implementation-based-on-rtmutex.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:28:34 +0200 Subject: rtmutex: add rwsem implementation based on rtmutex -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The RT specific R/W semaphore implementation restricts the number of readers to one because a writer cannot block on multiple readers and inherit its diff --git a/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch b/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch index 26224e377..4c194ae0f 100644 --- a/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch +++ b/debian/patches-rt/rtmutex-add-sleeping-lock-implementation.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:11:19 +0200 Subject: rtmutex: add sleeping lock implementation -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch b/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch index ef46a365d..2b1a84f81 100644 --- a/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch +++ b/debian/patches-rt/rtmutex-add-ww_mutex-addon-for-mutex-rt.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 12 Oct 2017 17:34:38 +0200 Subject: rtmutex: add ww_mutex addon for mutex-rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Sebastian Andrzej Siewior --- diff --git a/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch b/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch index d4c917601..bd47ccc38 100644 --- a/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch +++ b/debian/patches-rt/rtmutex-annotate-sleeping-lock-context.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 21 Sep 2017 14:25:13 +0200 Subject: [PATCH] rtmutex: annotate sleeping lock context -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The RCU code complains on schedule() within a rcu_readlock() section. The valid scenario on -RT is if a sleeping is held. In order to suppress diff --git a/debian/patches-rt/rtmutex-avoid-include-hell.patch b/debian/patches-rt/rtmutex-avoid-include-hell.patch index d026baacc..3c88eb029 100644 --- a/debian/patches-rt/rtmutex-avoid-include-hell.patch +++ b/debian/patches-rt/rtmutex-avoid-include-hell.patch @@ -1,7 +1,7 @@ Subject: rtmutex: Avoid include hell From: Thomas Gleixner Date: Wed, 29 Jun 2011 20:06:39 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Include only the required raw types. This avoids pulling in the complete spinlock header which in turn requires rtmutex.h at some point. diff --git a/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch b/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch index f3c71173e..37378b780 100644 --- a/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch +++ b/debian/patches-rt/rtmutex-export-lockdep-less-version-of-rt_mutex-s-lo.patch @@ -2,7 +2,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 16:36:39 +0200 Subject: rtmutex: export lockdep-less version of rt_mutex's lock, trylock and unlock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Required for lock implementation ontop of rtmutex. diff --git a/debian/patches-rt/rtmutex-futex-prepare-rt.patch b/debian/patches-rt/rtmutex-futex-prepare-rt.patch index eb5332bd6..9cfe4f741 100644 --- a/debian/patches-rt/rtmutex-futex-prepare-rt.patch +++ b/debian/patches-rt/rtmutex-futex-prepare-rt.patch @@ -1,7 +1,7 @@ Subject: rtmutex: Handle the various new futex race conditions From: Thomas Gleixner Date: Fri, 10 Jun 2011 11:04:15 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz RT opens a few new interesting race conditions in the rtmutex/futex combo due to futex hash bucket lock being a 'sleeping' spinlock and diff --git a/debian/patches-rt/rtmutex-lock-killable.patch b/debian/patches-rt/rtmutex-lock-killable.patch index 3e88156e3..5dc137c3d 100644 --- a/debian/patches-rt/rtmutex-lock-killable.patch +++ b/debian/patches-rt/rtmutex-lock-killable.patch @@ -1,7 +1,7 @@ Subject: rtmutex: Add rtmutex_lock_killable() From: Thomas Gleixner Date: Thu, 09 Jun 2011 11:43:52 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Add "killable" type to rtmutex. We need this since rtmutex are used as "normal" mutexes which do use this type. diff --git a/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch b/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch index a48685241..3e693889d 100644 --- a/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch +++ b/debian/patches-rt/rtmutex-trylock-is-okay-on-RT.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed 02 Dec 2015 11:34:07 +0100 Subject: rtmutex: trylock is okay on -RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz non-RT kernel could deadlock on rt_mutex_trylock() in softirq context. On -RT we don't run softirqs in IRQ context but in thread context so it is diff --git a/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch b/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch index 322c35e47..0df4013d2 100644 --- a/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch +++ b/debian/patches-rt/rtmutex-wire-up-RT-s-locking.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 12 Oct 2017 17:31:14 +0200 Subject: rtmutex: wire up RT's locking -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Signed-off-by: Thomas Gleixner Signed-off-by: Sebastian Andrzej Siewior diff --git a/debian/patches-rt/rtmutex_dont_include_rcu.patch b/debian/patches-rt/rtmutex_dont_include_rcu.patch index d91d57e95..7c4409581 100644 --- a/debian/patches-rt/rtmutex_dont_include_rcu.patch +++ b/debian/patches-rt/rtmutex_dont_include_rcu.patch @@ -1,6 +1,6 @@ From: Sebastian Andrzej Siewior Subject: rbtree: don't include the rcu header -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The RCU header pulls in spinlock.h and fails due not yet defined types: diff --git a/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch b/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch index 86a1e2d36..851ed26e6 100644 --- a/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch +++ b/debian/patches-rt/sched-Allow-pinned-user-tasks-to-be-awakened-to-the-.patch @@ -2,7 +2,7 @@ From: Mike Galbraith Date: Sun, 19 Aug 2018 08:28:35 +0200 Subject: [PATCH] sched: Allow pinned user tasks to be awakened to the CPU they pinned -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Since commit 7af443ee16976 ("sched/core: Require cpu_active() in select_task_rq(), for user tasks") select_fallback_rq() will BUG() if diff --git a/debian/patches-rt/sched-delay-put-task.patch b/debian/patches-rt/sched-delay-put-task.patch index f143090ad..510915d4b 100644 --- a/debian/patches-rt/sched-delay-put-task.patch +++ b/debian/patches-rt/sched-delay-put-task.patch @@ -1,7 +1,7 @@ Subject: sched: Move task_struct cleanup to RCU From: Thomas Gleixner Date: Tue, 31 May 2011 16:59:16 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz __put_task_struct() does quite some expensive work. We don't want to burden random tasks with that. diff --git a/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch b/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch index 63a442b90..66ea544a4 100644 --- a/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch +++ b/debian/patches-rt/sched-disable-rt-group-sched-on-rt.patch @@ -1,7 +1,7 @@ Subject: sched: Disable CONFIG_RT_GROUP_SCHED on RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 17:03:52 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Carsten reported problems when running: diff --git a/debian/patches-rt/sched-disable-ttwu-queue.patch b/debian/patches-rt/sched-disable-ttwu-queue.patch index 826a1947f..ba90b4c23 100644 --- a/debian/patches-rt/sched-disable-ttwu-queue.patch +++ b/debian/patches-rt/sched-disable-ttwu-queue.patch @@ -1,7 +1,7 @@ Subject: sched: Disable TTWU_QUEUE on RT From: Thomas Gleixner Date: Tue, 13 Sep 2011 16:42:35 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The queued remote wakeup mechanism can introduce rather large latencies if the number of migrated tasks is high. Disable it for RT. diff --git a/debian/patches-rt/sched-limit-nr-migrate.patch b/debian/patches-rt/sched-limit-nr-migrate.patch index b4db2cb2a..a18703751 100644 --- a/debian/patches-rt/sched-limit-nr-migrate.patch +++ b/debian/patches-rt/sched-limit-nr-migrate.patch @@ -1,7 +1,7 @@ Subject: sched: Limit the number of task migrations per batch From: Thomas Gleixner Date: Mon, 06 Jun 2011 12:12:51 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Put an upper limit on the number of tasks which are migrated per batch to avoid large latencies. diff --git a/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch b/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch index 99b9e5900..7e4e29619 100644 --- a/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch +++ b/debian/patches-rt/sched-might-sleep-do-not-account-rcu-depth.patch @@ -1,7 +1,7 @@ Subject: sched: Do not account rcu_preempt_depth on RT in might_sleep() From: Thomas Gleixner Date: Tue, 07 Jun 2011 09:19:06 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz RT changes the rcu_preempt_depth semantics, so we cannot check for it in might_sleep(). diff --git a/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch b/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch index 9d30d6c56..86200190e 100644 --- a/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch +++ b/debian/patches-rt/sched-migrate_disable-Add-export_symbol_gpl-for-__mi.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 9 Oct 2018 17:34:50 +0200 Subject: [PATCH] sched/migrate_disable: Add export_symbol_gpl for __migrate_disabled -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Jonathan reported that lttng/modules can't use __migrate_disabled(). This function is only used by sched/core itself and the tracing diff --git a/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch b/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch index cdd5c69f8..637417f78 100644 --- a/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch +++ b/debian/patches-rt/sched-migrate_disable-fallback-to-preempt_disable-in.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 5 Jul 2018 14:44:51 +0200 Subject: [PATCH] sched/migrate_disable: fallback to preempt_disable() instead barrier() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On SMP + !RT migrate_disable() is still around. It is not part of spin_lock() anymore so it has almost no users. However the futex code has a workaround for diff --git a/debian/patches-rt/sched-mmdrop-delayed.patch b/debian/patches-rt/sched-mmdrop-delayed.patch index 4331f59f1..2421bd1a6 100644 --- a/debian/patches-rt/sched-mmdrop-delayed.patch +++ b/debian/patches-rt/sched-mmdrop-delayed.patch @@ -1,7 +1,7 @@ Subject: sched: Move mmdrop to RCU on RT From: Thomas Gleixner Date: Mon, 06 Jun 2011 12:20:33 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Takes sleeping locks and calls into the memory allocator, so nothing we want to do in task switch and oder atomic contexts. diff --git a/debian/patches-rt/sched-rt-mutex-wakeup.patch b/debian/patches-rt/sched-rt-mutex-wakeup.patch index 7be90da93..2cd83108c 100644 --- a/debian/patches-rt/sched-rt-mutex-wakeup.patch +++ b/debian/patches-rt/sched-rt-mutex-wakeup.patch @@ -1,7 +1,7 @@ Subject: sched: Add saved_state for tasks blocked on sleeping locks From: Thomas Gleixner Date: Sat, 25 Jun 2011 09:21:04 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Spinlocks are state preserving in !RT. RT changes the state when a task gets blocked on a lock. So we need to remember the state before diff --git a/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch b/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch index 56b8ae5d7..ccf363497 100644 --- a/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch +++ b/debian/patches-rt/sched-workqueue-Only-wake-up-idle-workers-if-not-blo.patch @@ -1,7 +1,7 @@ From: Steven Rostedt Date: Mon, 18 Mar 2013 15:12:49 -0400 Subject: sched/workqueue: Only wake up idle workers if not blocked on sleeping spin lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz In -rt, most spin_locks() turn into mutexes. One of these spin_lock conversions is performed on the workqueue gcwq->lock. When the idle diff --git a/debian/patches-rt/scsi-fcoe-rt-aware.patch b/debian/patches-rt/scsi-fcoe-rt-aware.patch index bed8affd6..63998fc96 100644 --- a/debian/patches-rt/scsi-fcoe-rt-aware.patch +++ b/debian/patches-rt/scsi-fcoe-rt-aware.patch @@ -1,7 +1,7 @@ Subject: scsi/fcoe: Make RT aware. From: Thomas Gleixner Date: Sat, 12 Nov 2011 14:00:48 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Do not disable preemption while taking sleeping locks. All user look safe for migrate_diable() only. diff --git a/debian/patches-rt/seqlock-prevent-rt-starvation.patch b/debian/patches-rt/seqlock-prevent-rt-starvation.patch index 21f9d1058..63dc71335 100644 --- a/debian/patches-rt/seqlock-prevent-rt-starvation.patch +++ b/debian/patches-rt/seqlock-prevent-rt-starvation.patch @@ -1,7 +1,7 @@ Subject: seqlock: Prevent rt starvation From: Thomas Gleixner Date: Wed, 22 Feb 2012 12:03:30 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz If a low prio writer gets preempted while holding the seqlock write locked, a high prio reader spins forever on RT. @@ -169,7 +169,7 @@ Signed-off-by: Thomas Gleixner { unsigned int hh_alen = 0; unsigned int seq; -@@ -493,7 +493,7 @@ +@@ -493,7 +493,7 @@ static inline int neigh_hh_output(const static inline int neigh_output(struct neighbour *n, struct sk_buff *skb) { @@ -178,7 +178,7 @@ Signed-off-by: Thomas Gleixner if ((n->nud_state & NUD_CONNECTED) && hh->hh_len) return neigh_hh_output(hh, skb); -@@ -534,7 +534,7 @@ +@@ -534,7 +534,7 @@ struct neighbour_cb { #define NEIGH_CB(skb) ((struct neighbour_cb *)(skb)->cb) diff --git a/debian/patches-rt/series b/debian/patches-rt/series index 7838ece48..69646621f 100644 --- a/debian/patches-rt/series +++ b/debian/patches-rt/series @@ -36,6 +36,7 @@ cgroup-use-irqsave-in-cgroup_rstat_flush_locked.patch fscache-initialize-cookie-hash-table-raw-spinlocks.patch Drivers-hv-vmbus-include-header-for-get_irq_regs.patch percpu-include-irqflags.h-for-raw_local_irq_save.patch +perf-x86-intel-Delay-memory-deallocation-until-cpu_d.patch ############################################################ # Ready for posting @@ -54,6 +55,7 @@ arm64-KVM-compute_layout-before-altenates-are-applie.patch of-allocate-free-phandle-cache-outside-of-the-devtre.patch mm-kasan-make-quarantine_lock-a-raw_spinlock_t.patch EXP-rcu-Revert-expedited-GP-parallelization-cleverne.patch +kmemleak-Turn-kmemleak_lock-to-raw-spinlock-on-RT.patch ############################################################### # Stuff broken upstream and upstream wants something different @@ -406,6 +408,7 @@ watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch drm-i915-disable-tracing-on-RT.patch +drm-i915-skip-DRM_I915_LOW_LEVEL_TRACEPOINTS-with-NO.patch # CGROUPS cgroups-use-simple-wait-in-css_release.patch diff --git a/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch b/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch index 5d29462f3..fa6c0c97f 100644 --- a/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch +++ b/debian/patches-rt/signal-revert-ptrace-preempt-magic.patch @@ -1,7 +1,7 @@ Subject: signal: Revert ptrace preempt magic From: Thomas Gleixner Date: Wed, 21 Sep 2011 19:57:12 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Upstream commit '53da1d9456fe7f8 fix ptrace slowness' is nothing more than a bandaid around the ptrace design trainwreck. It's not a diff --git a/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch b/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch index d25a3a0da..73593b9b4 100644 --- a/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch +++ b/debian/patches-rt/signals-allow-rt-tasks-to-cache-one-sigqueue-struct.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Fri, 3 Jul 2009 08:44:56 -0500 Subject: signals: Allow rt tasks to cache one sigqueue struct -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz To avoid allocation allow rt tasks to cache one sigqueue struct in task struct. diff --git a/debian/patches-rt/skbufhead-raw-lock.patch b/debian/patches-rt/skbufhead-raw-lock.patch index 8e48c6aab..853cfaa11 100644 --- a/debian/patches-rt/skbufhead-raw-lock.patch +++ b/debian/patches-rt/skbufhead-raw-lock.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Tue, 12 Jul 2011 15:38:34 +0200 Subject: net: Use skbufhead with raw lock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Use the rps lock as rawlock so we can keep irq-off regions. It looks low latency. However we can't kfree() from this context therefore we defer this @@ -34,7 +34,7 @@ Signed-off-by: Thomas Gleixner }; struct sk_buff; -@@ -1691,6 +1692,12 @@ static inline void skb_queue_head_init(s +@@ -1702,6 +1703,12 @@ static inline void skb_queue_head_init(s __skb_queue_head_init(list); } @@ -66,7 +66,7 @@ Signed-off-by: Thomas Gleixner #endif } -@@ -5239,7 +5239,7 @@ static void flush_backlog(struct work_st +@@ -5244,7 +5244,7 @@ static void flush_backlog(struct work_st skb_queue_walk_safe(&sd->input_pkt_queue, skb, tmp) { if (skb->dev->reg_state == NETREG_UNREGISTERING) { __skb_unlink(skb, &sd->input_pkt_queue); @@ -75,7 +75,7 @@ Signed-off-by: Thomas Gleixner input_queue_head_incr(sd); } } -@@ -5249,11 +5249,14 @@ static void flush_backlog(struct work_st +@@ -5254,11 +5254,14 @@ static void flush_backlog(struct work_st skb_queue_walk_safe(&sd->process_queue, skb, tmp) { if (skb->dev->reg_state == NETREG_UNREGISTERING) { __skb_unlink(skb, &sd->process_queue); @@ -91,7 +91,7 @@ Signed-off-by: Thomas Gleixner } static void flush_all_backlogs(void) -@@ -5832,7 +5835,9 @@ static int process_backlog(struct napi_s +@@ -5837,7 +5840,9 @@ static int process_backlog(struct napi_s while (again) { struct sk_buff *skb; @@ -101,7 +101,7 @@ Signed-off-by: Thomas Gleixner rcu_read_lock(); __netif_receive_skb(skb); rcu_read_unlock(); -@@ -5840,9 +5845,9 @@ static int process_backlog(struct napi_s +@@ -5845,9 +5850,9 @@ static int process_backlog(struct napi_s if (++work >= quota) return work; @@ -112,7 +112,7 @@ Signed-off-by: Thomas Gleixner rps_lock(sd); if (skb_queue_empty(&sd->input_pkt_queue)) { /* -@@ -6307,13 +6312,21 @@ static __latent_entropy void net_rx_acti +@@ -6312,13 +6317,21 @@ static __latent_entropy void net_rx_acti unsigned long time_limit = jiffies + usecs_to_jiffies(netdev_budget_usecs); int budget = netdev_budget; @@ -134,7 +134,7 @@ Signed-off-by: Thomas Gleixner for (;;) { struct napi_struct *n; -@@ -9299,10 +9312,13 @@ static int dev_cpu_dead(unsigned int old +@@ -9304,10 +9317,13 @@ static int dev_cpu_dead(unsigned int old netif_rx_ni(skb); input_queue_head_incr(oldsd); } @@ -149,7 +149,7 @@ Signed-off-by: Thomas Gleixner return 0; } -@@ -9611,8 +9627,9 @@ static int __init net_dev_init(void) +@@ -9616,8 +9632,9 @@ static int __init net_dev_init(void) INIT_WORK(flush, flush_backlog); diff --git a/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch b/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch index 52ae08273..e1171dfc9 100644 --- a/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch +++ b/debian/patches-rt/slub-disable-SLUB_CPU_PARTIAL.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 15 Apr 2015 19:00:47 +0200 Subject: slub: Disable SLUB_CPU_PARTIAL -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915 |in_atomic(): 1, irqs_disabled(): 0, pid: 87, name: rcuop/7 diff --git a/debian/patches-rt/slub-enable-irqs-for-no-wait.patch b/debian/patches-rt/slub-enable-irqs-for-no-wait.patch index 90632730a..e54cf3815 100644 --- a/debian/patches-rt/slub-enable-irqs-for-no-wait.patch +++ b/debian/patches-rt/slub-enable-irqs-for-no-wait.patch @@ -1,7 +1,7 @@ Subject: slub: Enable irqs for __GFP_WAIT From: Thomas Gleixner Date: Wed, 09 Jan 2013 12:08:15 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz SYSTEM_RUNNING might be too late for enabling interrupts. Allocations with GFP_WAIT can happen before that. So use this as an indicator. diff --git a/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch b/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch index 0276d38d2..20089aa5d 100644 --- a/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch +++ b/debian/patches-rt/softirq-disable-softirq-stacks-for-rt.patch @@ -1,7 +1,7 @@ Subject: softirq: Disable softirq stacks for RT From: Thomas Gleixner Date: Mon, 18 Jul 2011 13:59:17 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Disable extra stacks for softirqs. We want to preempt softirqs and having them on special IRQ-stack does not make this easier. diff --git a/debian/patches-rt/softirq-preempt-fix-3-re.patch b/debian/patches-rt/softirq-preempt-fix-3-re.patch index ed3ba515d..19acf8231 100644 --- a/debian/patches-rt/softirq-preempt-fix-3-re.patch +++ b/debian/patches-rt/softirq-preempt-fix-3-re.patch @@ -1,7 +1,7 @@ Subject: softirq: Check preemption after reenabling interrupts From: Thomas Gleixner Date: Sun, 13 Nov 2011 17:17:09 +0100 (CET) -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz raise_softirq_irqoff() disables interrupts and wakes the softirq daemon, but after reenabling interrupts there is no preemption check, @@ -112,7 +112,7 @@ Signed-off-by: Thomas Gleixner } --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -2707,6 +2707,7 @@ static void __netif_reschedule(struct Qd +@@ -2712,6 +2712,7 @@ static void __netif_reschedule(struct Qd sd->output_queue_tailp = &q->next_sched; raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_restore(flags); @@ -120,7 +120,7 @@ Signed-off-by: Thomas Gleixner } void __netif_schedule(struct Qdisc *q) -@@ -2769,6 +2770,7 @@ void __dev_kfree_skb_irq(struct sk_buff +@@ -2774,6 +2775,7 @@ void __dev_kfree_skb_irq(struct sk_buff __this_cpu_write(softnet_data.completion_queue, skb); raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_restore(flags); @@ -128,7 +128,7 @@ Signed-off-by: Thomas Gleixner } EXPORT_SYMBOL(__dev_kfree_skb_irq); -@@ -4241,6 +4243,7 @@ static int enqueue_to_backlog(struct sk_ +@@ -4246,6 +4248,7 @@ static int enqueue_to_backlog(struct sk_ rps_unlock(sd); local_irq_restore(flags); @@ -136,7 +136,7 @@ Signed-off-by: Thomas Gleixner atomic_long_inc(&skb->dev->rx_dropped); kfree_skb(skb); -@@ -5794,12 +5797,14 @@ static void net_rps_action_and_irq_enabl +@@ -5799,12 +5802,14 @@ static void net_rps_action_and_irq_enabl sd->rps_ipi_list = NULL; local_irq_enable(); @@ -151,7 +151,7 @@ Signed-off-by: Thomas Gleixner } static bool sd_has_rps_ipi_waiting(struct softnet_data *sd) -@@ -5877,6 +5882,7 @@ void __napi_schedule(struct napi_struct +@@ -5882,6 +5887,7 @@ void __napi_schedule(struct napi_struct local_irq_save(flags); ____napi_schedule(this_cpu_ptr(&softnet_data), n); local_irq_restore(flags); @@ -159,7 +159,7 @@ Signed-off-by: Thomas Gleixner } EXPORT_SYMBOL(__napi_schedule); -@@ -9281,6 +9287,7 @@ static int dev_cpu_dead(unsigned int old +@@ -9286,6 +9292,7 @@ static int dev_cpu_dead(unsigned int old raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_enable(); diff --git a/debian/patches-rt/softirq-split-locks.patch b/debian/patches-rt/softirq-split-locks.patch index 04dfb7895..3c8145795 100644 --- a/debian/patches-rt/softirq-split-locks.patch +++ b/debian/patches-rt/softirq-split-locks.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 04 Oct 2012 14:20:47 +0100 Subject: softirq: Split softirq locks -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The 3.x RT series removed the split softirq implementation in favour of pushing softirq processing into the context of the thread which diff --git a/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch b/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch index 7dcc6eb92..fea134b36 100644 --- a/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch +++ b/debian/patches-rt/softirq-split-timer-softirqs-out-of-ksoftirqd.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 20 Jan 2016 16:34:17 +0100 Subject: softirq: split timer softirqs out of ksoftirqd -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The softirqd runs in -RT with SCHED_FIFO (prio 1) and deals mostly with timer wakeup which can not happen in hardirq context. The prio has been diff --git a/debian/patches-rt/spinlock-types-separate-raw.patch b/debian/patches-rt/spinlock-types-separate-raw.patch index 444157fad..2a9b8bd67 100644 --- a/debian/patches-rt/spinlock-types-separate-raw.patch +++ b/debian/patches-rt/spinlock-types-separate-raw.patch @@ -1,7 +1,7 @@ Subject: spinlock: Split the lock types header From: Thomas Gleixner Date: Wed, 29 Jun 2011 19:34:01 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Split raw_spinlock into its own file and the remaining spinlock_t into its own non-RT header. The non-RT header will be replaced later by sleeping diff --git a/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch b/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch index 8b2fd1c40..bda99ba26 100644 --- a/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch +++ b/debian/patches-rt/squashfs-make-use-of-local-lock-in-multi_cpu-decompr.patch @@ -2,7 +2,7 @@ From: Julia Cartwright Date: Mon, 7 May 2018 08:58:57 -0500 Subject: [PATCH] squashfs: make use of local lock in multi_cpu decompressor -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Currently, the squashfs multi_cpu decompressor makes use of get_cpu_ptr()/put_cpu_ptr(), which unconditionally disable preemption diff --git a/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch b/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch index c23f15edb..a8636bd80 100644 --- a/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch +++ b/debian/patches-rt/srcu-replace-local_irqsave-with-a-locallock.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Thu, 12 Oct 2017 18:37:12 +0200 Subject: [PATCH] srcu: replace local_irqsave() with a locallock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There are two instances which disable interrupts in order to become a stable this_cpu_ptr() pointer. The restore part is coupled with diff --git a/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch b/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch index 4655cd3f6..8767c5bba 100644 --- a/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch +++ b/debian/patches-rt/srcu-use-cpu_online-instead-custom-check.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 13 Sep 2017 14:43:41 +0200 Subject: [PATCH] srcu: use cpu_online() instead custom check -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The current check via srcu_online is slightly racy because after looking at srcu_online there could be an interrupt that interrupted us long diff --git a/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch b/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch index 4fda2b27f..b9d53c622 100644 --- a/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch +++ b/debian/patches-rt/sunrpc-make-svc_xprt_do_enqueue-use-get_cpu_light.patch @@ -1,7 +1,7 @@ From: Mike Galbraith Date: Wed, 18 Feb 2015 16:05:28 +0100 Subject: sunrpc: Make svc_xprt_do_enqueue() use get_cpu_light() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz |BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915 |in_atomic(): 1, irqs_disabled(): 0, pid: 3194, name: rpc.nfsd diff --git a/debian/patches-rt/sysfs-realtime-entry.patch b/debian/patches-rt/sysfs-realtime-entry.patch index 0d676daf8..304e8bcf5 100644 --- a/debian/patches-rt/sysfs-realtime-entry.patch +++ b/debian/patches-rt/sysfs-realtime-entry.patch @@ -1,7 +1,7 @@ Subject: sysfs: Add /sys/kernel/realtime entry From: Clark Williams Date: Sat Jul 30 21:55:53 2011 -0500 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Add a /sys/kernel entry to indicate that the kernel is a realtime kernel. diff --git a/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch b/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch index dbd00b429..1884e8aed 100644 --- a/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch +++ b/debian/patches-rt/tasklet-rt-prevent-tasklets-from-going-into-infinite-spin-in-rt.patch @@ -1,7 +1,7 @@ Subject: tasklet: Prevent tasklets from going into infinite spin in RT From: Ingo Molnar Date: Tue Nov 29 20:18:22 2011 -0500 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When CONFIG_PREEMPT_RT_FULL is enabled, tasklets run as threads, and spinlocks turn are mutexes. But this can cause issues with diff --git a/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch b/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch index 05048c8fe..8eead709a 100644 --- a/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch +++ b/debian/patches-rt/thermal-Defer-thermal-wakups-to-threads.patch @@ -1,7 +1,7 @@ From: Daniel Wagner Date: Tue, 17 Feb 2015 09:37:44 +0100 Subject: thermal: Defer thermal wakups to threads -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz On RT the spin lock in pkg_temp_thermal_platfrom_thermal_notify will call schedule while we run in irq context. diff --git a/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch b/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch index edae9d3ca..a12be7796 100644 --- a/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch +++ b/debian/patches-rt/time-hrtimer-avoid-schedule_work-with-interrupts-dis.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Wed, 15 Nov 2017 17:29:51 +0100 Subject: [PATCH] time/hrtimer: avoid schedule_work() with interrupts disabled -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz The NOHZ code tries to schedule a workqueue with interrupts disabled. Since this does not work -RT I am switching it to swork instead. diff --git a/debian/patches-rt/timekeeping-split-jiffies-lock.patch b/debian/patches-rt/timekeeping-split-jiffies-lock.patch index 8b719e2af..6b1d995f9 100644 --- a/debian/patches-rt/timekeeping-split-jiffies-lock.patch +++ b/debian/patches-rt/timekeeping-split-jiffies-lock.patch @@ -1,7 +1,7 @@ Subject: timekeeping: Split jiffies seqlock From: Thomas Gleixner Date: Thu, 14 Feb 2013 22:36:59 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Replace jiffies_lock seqlock with a simple seqcounter and a rawlock so it can be taken in atomic context on RT. diff --git a/debian/patches-rt/timers-prepare-for-full-preemption.patch b/debian/patches-rt/timers-prepare-for-full-preemption.patch index 8b52598b3..7d96bc16e 100644 --- a/debian/patches-rt/timers-prepare-for-full-preemption.patch +++ b/debian/patches-rt/timers-prepare-for-full-preemption.patch @@ -1,7 +1,7 @@ From: Ingo Molnar Date: Fri, 3 Jul 2009 08:29:34 -0500 Subject: timers: Prepare for full preemption -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When softirqs can be preempted we need to make sure that cancelling the timer from the active thread can not deadlock vs. a running timer diff --git a/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch b/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch index a06d11eee..2c5f58735 100644 --- a/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch +++ b/debian/patches-rt/tpm_tis-fix-stall-after-iowrite-s.patch @@ -1,7 +1,7 @@ From: Haris Okanovic Date: Tue, 15 Aug 2017 15:13:08 -0500 Subject: [PATCH] tpm_tis: fix stall after iowrite*()s -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz ioread8() operations to TPM MMIO addresses can stall the cpu when immediately following a sequence of iowrite*()'s to the same region. diff --git a/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch b/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch index 9879536bf..921e0de3e 100644 --- a/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch +++ b/debian/patches-rt/tty-serial-8250-don-t-take-the-trylock-during-oops.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 11 Apr 2016 16:55:02 +0200 Subject: [PATCH] tty: serial: 8250: don't take the trylock during oops -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz An oops with irqs off (panic() from irqsafe hrtimer like the watchdog timer) will lead to a lockdep warning on each invocation and as such diff --git a/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch b/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch index 623fc24b3..f78fd3ee4 100644 --- a/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch +++ b/debian/patches-rt/tty-serial-pl011-warning-about-uninitialized.patch @@ -4,7 +4,7 @@ Subject: [PATCH] tty: serial: pl011: explicitly initialize the flags variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Silence the following gcc warning: diff --git a/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch b/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch index d8245a363..91a2894ca 100644 --- a/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch +++ b/debian/patches-rt/upstream-net-rt-remove-preemption-disabling-in-netif_rx.patch @@ -1,7 +1,7 @@ Subject: net: Remove preemption disabling in netif_rx() From: Priyanka Jain Date: Thu, 17 May 2012 09:35:11 +0530 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz 1)enqueue_to_backlog() (called from netif_rx) should be bind to a particluar CPU. This can be achieved by @@ -38,7 +38,7 @@ Signed-off-by: Thomas Gleixner --- a/net/core/dev.c +++ b/net/core/dev.c -@@ -4465,7 +4465,7 @@ static int netif_rx_internal(struct sk_b +@@ -4470,7 +4470,7 @@ static int netif_rx_internal(struct sk_b struct rps_dev_flow voidflow, *rflow = &voidflow; int cpu; @@ -47,7 +47,7 @@ Signed-off-by: Thomas Gleixner rcu_read_lock(); cpu = get_rps_cpu(skb->dev, skb, &rflow); -@@ -4475,14 +4475,14 @@ static int netif_rx_internal(struct sk_b +@@ -4480,14 +4480,14 @@ static int netif_rx_internal(struct sk_b ret = enqueue_to_backlog(skb, cpu, &rflow->last_qtail); rcu_read_unlock(); diff --git a/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch b/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch index bb4b91e3c..3f5404e0c 100644 --- a/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch +++ b/debian/patches-rt/usb-do-not-disable-interrupts-in-giveback.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Fri, 8 Nov 2013 17:34:54 +0100 Subject: usb: do no disable interrupts in giveback -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Since commit 94dfd7ed ("USB: HCD: support giveback of URB in tasklet context") the USB code disables interrupts before invoking the complete diff --git a/debian/patches-rt/wait.h-include-atomic.h.patch b/debian/patches-rt/wait.h-include-atomic.h.patch index 831db0da5..da7fbab9b 100644 --- a/debian/patches-rt/wait.h-include-atomic.h.patch +++ b/debian/patches-rt/wait.h-include-atomic.h.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 28 Oct 2013 12:19:57 +0100 Subject: wait.h: include atomic.h -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz | CC init/main.o |In file included from include/linux/mmzone.h:9:0, diff --git a/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch b/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch index 5350e69d5..eb72a58fc 100644 --- a/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch +++ b/debian/patches-rt/watchdog-prevent-deferral-of-watchdogd-wakeup-on-RT.patch @@ -1,7 +1,7 @@ From: Julia Cartwright Date: Fri, 28 Sep 2018 21:03:51 +0000 Subject: [PATCH] watchdog: prevent deferral of watchdogd wakeup on RT -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When PREEMPT_RT_FULL is enabled, all hrtimer expiry functions are deferred for execution into the context of ktimersoftd unless otherwise diff --git a/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch b/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch index 08ec9b31f..796aad677 100644 --- a/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch +++ b/debian/patches-rt/work-queue-work-around-irqsafe-timer-optimization.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Mon, 01 Jul 2013 11:02:42 +0200 Subject: workqueue: Prevent workqueue versus ata-piix livelock -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz An Intel i7 system regularly detected rcu_preempt stalls after the kernel was upgraded from 3.6-rt to 3.8-rt. When the stall happened, disk I/O was no diff --git a/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch b/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch index b5c03f0a3..ee90c20c5 100644 --- a/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch +++ b/debian/patches-rt/work-simple-Simple-work-queue-implemenation.patch @@ -1,7 +1,7 @@ From: Daniel Wagner Date: Fri, 11 Jul 2014 15:26:11 +0200 Subject: work-simple: Simple work queue implemenation -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Provides a framework for enqueuing callbacks from irq context PREEMPT_RT_FULL safe. The callbacks are executed in kthread context. diff --git a/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch b/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch index 87f5e3469..bc99b278d 100644 --- a/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch +++ b/debian/patches-rt/work-simple-drop-a-shit-statement-in-SWORK_EVENT_PEN.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 10 Sep 2018 18:00:31 +0200 Subject: [PATCH] work-simple: drop a shit statement in SWORK_EVENT_PENDING -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Dan Carpenter reported | smatch warnings: diff --git a/debian/patches-rt/workqueue-distangle-from-rq-lock.patch b/debian/patches-rt/workqueue-distangle-from-rq-lock.patch index 06b228840..c8a86dc8f 100644 --- a/debian/patches-rt/workqueue-distangle-from-rq-lock.patch +++ b/debian/patches-rt/workqueue-distangle-from-rq-lock.patch @@ -22,7 +22,7 @@ Cc: Jens Axboe Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20110622174919.135236139@linutronix.de Signed-off-by: Thomas Gleixner -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz [bigeasy: preempt_disable() around wq_worker_sleeping() by Daniel Bristot de Oliveira] diff --git a/debian/patches-rt/workqueue-prevent-deadlock-stall.patch b/debian/patches-rt/workqueue-prevent-deadlock-stall.patch index 9bc34b09a..95249e3d0 100644 --- a/debian/patches-rt/workqueue-prevent-deadlock-stall.patch +++ b/debian/patches-rt/workqueue-prevent-deadlock-stall.patch @@ -1,7 +1,7 @@ Subject: workqueue: Prevent deadlock/stall on RT From: Thomas Gleixner Date: Fri, 27 Jun 2014 16:24:52 +0200 (CEST) -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Austin reported a XFS deadlock/stall on RT where scheduled work gets never exececuted and tasks are waiting for each other for ever. diff --git a/debian/patches-rt/workqueue-use-locallock.patch b/debian/patches-rt/workqueue-use-locallock.patch index ae89a114c..e395acfc5 100644 --- a/debian/patches-rt/workqueue-use-locallock.patch +++ b/debian/patches-rt/workqueue-use-locallock.patch @@ -1,7 +1,7 @@ Subject: workqueue: Use local irq lock instead of irq disable regions From: Thomas Gleixner Date: Sun, 17 Jul 2011 21:42:26 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Use a local_irq_lock as a replacement for irq off regions. We keep the semantic of irq-off in regard to the pool->lock and remain preemptible. diff --git a/debian/patches-rt/workqueue-use-rcu.patch b/debian/patches-rt/workqueue-use-rcu.patch index ebdcd2efd..6285fdafa 100644 --- a/debian/patches-rt/workqueue-use-rcu.patch +++ b/debian/patches-rt/workqueue-use-rcu.patch @@ -1,7 +1,7 @@ Subject: workqueue: Use normal rcu From: Thomas Gleixner Date: Wed, 24 Jul 2013 15:26:54 +0200 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There is no need for sched_rcu. The undocumented reason why sched_rcu is used is to avoid a few explicit rcu_read_lock()/unlock() pairs by diff --git a/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch b/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch index 40ff9ba82..c5f80f9bf 100644 --- a/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch +++ b/debian/patches-rt/x86-crypto-reduce-preempt-disabled-regions.patch @@ -1,7 +1,7 @@ Subject: x86: crypto: Reduce preempt disabled regions From: Peter Zijlstra Date: Mon, 14 Nov 2011 18:19:27 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Restrict the preempt disabled regions to the actual floating point operations and enable preemption for the administrative actions. diff --git a/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch b/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch index 0e62d2920..0371a8e34 100644 --- a/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch +++ b/debian/patches-rt/x86-efi-drop-task_lock-from-efi_switch_mm.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 24 Jul 2018 14:48:55 +0200 Subject: [PATCH] x86/efi: drop task_lock() from efi_switch_mm() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz efi_switch_mm() is a wrapper around switch_mm() which saves current's ->active_mm, sets the requests mm as ->active_mm and invokes diff --git a/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch b/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch index 7245a12d6..5f4cee002 100644 --- a/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch +++ b/debian/patches-rt/x86-fpu-Disable-preemption-around-local_bh_disable.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 11 Dec 2018 15:10:33 +0100 Subject: [PATCH] x86/fpu: Disable preemption around local_bh_disable() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz __fpu__restore_sig() restores the content of the FPU state in the CPUs and in order to avoid concurency it disbles BH. On !RT it also disables diff --git a/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch b/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch index fa4537210..a85b2c0e1 100644 --- a/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch +++ b/debian/patches-rt/x86-highmem-add-a-already-used-pte-check.patch @@ -1,7 +1,7 @@ From: Sebastian Andrzej Siewior Date: Mon, 11 Mar 2013 17:09:55 +0100 Subject: x86/highmem: Add a "already used pte" check -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz This is a copy from kmap_atomic_prot(). diff --git a/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch b/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch index 00865bd4c..8668e80db 100644 --- a/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch +++ b/debian/patches-rt/x86-ioapic-Don-t-let-setaffinity-unmask-threaded-EOI.patch @@ -2,7 +2,7 @@ From: Thomas Gleixner Date: Tue, 17 Jul 2018 18:25:31 +0200 Subject: [PATCH] x86/ioapic: Don't let setaffinity unmask threaded EOI interrupt too early -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz There is an issue with threaded interrupts which are marked ONESHOT and using the fasteoi handler. diff --git a/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch b/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch index bef74ed44..e24badf28 100644 --- a/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch +++ b/debian/patches-rt/x86-kvm-require-const-tsc-for-rt.patch @@ -1,7 +1,7 @@ Subject: x86: kvm Require const tsc for RT From: Thomas Gleixner Date: Sun, 06 Nov 2011 12:26:18 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Non constant TSC is a nightmare on bare metal already, but with virtualization it becomes a complete disaster because the workarounds diff --git a/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch b/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch index 1179b30b6..3f6606371 100644 --- a/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch +++ b/debian/patches-rt/x86-mm-pat-disable-preemption-__split_large_page-aft.patch @@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior Date: Tue, 11 Dec 2018 21:53:43 +0100 Subject: [PATCH] x86/mm/pat: disable preemption __split_large_page() after spin_lock() -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Commit "x86/mm/pat: Disable preemption around __flush_tlb_all()" added a warning if __flush_tlb_all() is invoked in preemptible context. On !RT diff --git a/debian/patches-rt/x86-preempt-lazy.patch b/debian/patches-rt/x86-preempt-lazy.patch index 9a8d149fa..80cc1821f 100644 --- a/debian/patches-rt/x86-preempt-lazy.patch +++ b/debian/patches-rt/x86-preempt-lazy.patch @@ -1,7 +1,7 @@ Subject: x86: Support for lazy preemption From: Thomas Gleixner Date: Thu, 01 Nov 2012 11:03:47 +0100 -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Implement the x86 pieces for lazy preempt. diff --git a/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch b/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch index cd681f398..dbdc0926c 100644 --- a/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch +++ b/debian/patches-rt/x86-signal-delay-calling-signals-on-32bit.patch @@ -1,7 +1,7 @@ From: Yang Shi Date: Thu, 10 Dec 2015 10:58:51 -0800 Subject: x86/signal: delay calling signals on 32bit -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz When running some ptrace single step tests on x86-32 machine, the below problem is triggered: diff --git a/debian/patches-rt/x86-stackprot-no-random-on-rt.patch b/debian/patches-rt/x86-stackprot-no-random-on-rt.patch index 477106414..9b326507b 100644 --- a/debian/patches-rt/x86-stackprot-no-random-on-rt.patch +++ b/debian/patches-rt/x86-stackprot-no-random-on-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Thu, 16 Dec 2010 14:25:18 +0100 Subject: x86: stackprotector: Avoid random pool on rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz CPU bringup calls into the random pool to initialize the stack canary. During boot that works nicely even on RT as the might sleep diff --git a/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch b/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch index 082124a2a..b02941a69 100644 --- a/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch +++ b/debian/patches-rt/x86-use-gen-rwsem-spinlocks-rt.patch @@ -1,7 +1,7 @@ From: Thomas Gleixner Date: Sun, 26 Jul 2009 02:21:32 +0200 Subject: x86: Use generic rwsem_spinlocks on -rt -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.8-rt6.tar.xz +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.10-rt8.tar.xz Simplifies the separation of anon_rw_semaphores and rw_semaphores for -rt.