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[rt] Update to 4.9.13-rt10

This commit is contained in:
Ben Hutchings 2017-02-27 15:57:02 +00:00
parent 49569a3b8c
commit ab97125626
293 changed files with 711 additions and 380 deletions
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4
debian/changelog vendored
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@ -96,6 +96,10 @@ linux (4.9.13-1) UNRELEASED; urgency=medium
* time: Disable TIMER_STATS (CVE-2017-5967)
* sctp: deny peeloff operation on asocs with threads sleeping on it
(CVE-2017-6353)
* [rt] Update to 4.9.13-rt10:
- sched/rt: Add a missing rescheduling point
- lockdep: Handle statically initialized PER_CPU locks proper
- Change export of rt_mutex_destroy() back to GPL-only
-- Ben Hutchings <ben@decadent.org.uk> Sat, 18 Feb 2017 00:38:10 +0000

2
debian/patches/features/all/rt/ARM-enable-irq-in-translation-section-permission-fau.patch vendored
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@ -1,7 +1,7 @@
From: "Yadi.hu" <yadi.hu@windriver.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Probably happens on all ARM, with
CONFIG_PREEMPT_RT_FULL

2
debian/patches/features/all/rt/HACK-printk-drop-the-logbuf_lock-more-often.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/KVM-arm-arm64-downgrade-preempt_disable-d-region-to-.patch vendored
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@ -1,7 +1,7 @@
From: Josh Cartwright <joshc@ni.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/KVM-lapic-mark-LAPIC-timer-handler-as-irqsafe.patch vendored
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@ -1,7 +1,7 @@
From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Wed, 8 Apr 2015 20:33:25 -0300
Subject: KVM: lapic: mark LAPIC timer handler as irqsafe
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Since lapic timer handler only wakes up a simple waitqueue,
it can be executed from hardirq context.

2
debian/patches/features/all/rt/NFSv4-replace-seqcount_t-with-a-seqlock_t.patch vendored
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@ -5,7 +5,7 @@ Cc: Anna Schumaker <anna.schumaker@netapp.com>,
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/acpi-rt-Convert-acpi_gbl_hardware-lock-back-to-a-raw.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org>
Date: Wed, 13 Feb 2013 09:26:05 -0500
Subject: acpi/rt: Convert acpi_gbl_hardware lock back to a raw_spinlock_t
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
We hit the following bug with 3.6-rt:

2
debian/patches/features/all/rt/arch-arm64-Add-lazy-preempt-support.patch vendored
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@ -1,7 +1,7 @@
From: Anders Roxell <anders.roxell@linaro.org>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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,

2
debian/patches/features/all/rt/arm-at91-pit-remove-irq-handler-when-clock-is-unused.patch vendored
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@ -1,7 +1,7 @@
From: Benedikt Spranger <b.spranger@linutronix.de>
Date: Sat, 6 Mar 2010 17:47:10 +0100
Subject: ARM: AT91: PIT: Remove irq handler when clock event is unused
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Setup and remove the interrupt handler in clock event mode selection.
This avoids calling the (shared) interrupt handler when the device is

2
debian/patches/features/all/rt/arm-at91-tclib-default-to-tclib-timer-for-rt.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sat, 1 May 2010 18:29:35 +0200
Subject: ARM: at91: tclib: Default to tclib timer for RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
RT is not too happy about the shared timer interrupt in AT91
devices. Default to tclib timer for RT.

2
debian/patches/features/all/rt/arm-convert-boot-lock-to-raw.patch vendored
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@ -1,7 +1,7 @@
From: Frank Rowand <frank.rowand@am.sony.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/arm-enable-highmem-for-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: arm: Enable highmem for rt
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 13 Feb 2013 11:03:11 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
fixup highmem for ARM.

2
debian/patches/features/all/rt/arm-highmem-flush-tlb-on-unmap.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/arm-include-definition-for-cpumask_t.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
This definition gets pulled in by other files. With the (later) split of
RCU and spinlock.h it won't compile anymore.

2
debian/patches/features/all/rt/arm-kprobe-replace-patch_lock-to-raw-lock.patch vendored
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@ -2,7 +2,7 @@ From 6e2639b6d72e1ef9e264aa658db3b6171d9ba12f Mon Sep 17 00:00:00 2001
From: Yang Shi <yang.shi@linaro.org>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
When running kprobe on -rt kernel, the below bug is caught:

2
debian/patches/features/all/rt/arm-preempt-lazy-support.patch vendored
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@ -1,7 +1,7 @@
Subject: arm: Add support for lazy preemption
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 31 Oct 2012 12:04:11 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Implement the arm pieces for lazy preempt.

2
debian/patches/features/all/rt/arm-unwind-use_raw_lock.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Mostly unwind is done with irqs enabled however SLUB may call it with
irqs disabled while creating a new SLUB cache.

2
debian/patches/features/all/rt/arm64-xen--Make-XEN-depend-on-non-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: arm64/xen: Make XEN depend on !RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 12 Oct 2015 11:18:40 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
It's not ready and probably never will be, unless xen folks have a
look at it.

2
debian/patches/features/all/rt/at91_dont_enable_disable_clock.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/ata-disable-interrupts-if-non-rt.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <srostedt@redhat.com>
Date: Fri, 3 Jul 2009 08:44:29 -0500
Subject: ata: Do not disable interrupts in ide code for preempt-rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Use the local_irq_*_nort variants.

2
debian/patches/features/all/rt/block-blk-mq-use-swait.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 13 Feb 2015 11:01:26 +0100
Subject: block: blk-mq: Use swait
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/block-mq-don-t-complete-requests-via-IPI.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
The IPI runs in hardirq context and there are sleeping locks. This patch
moves the completion into a workqueue.

2
debian/patches/features/all/rt/block-mq-drop-preempt-disable.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
preempt_disable() and get_cpu() don't play well together with the sleeping
locks it tries to allocate later.

2
debian/patches/features/all/rt/block-mq-use-cpu_light.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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().

2
debian/patches/features/all/rt/block-shorten-interrupt-disabled-regions.patch vendored
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@ -1,7 +1,7 @@
Subject: block: Shorten interrupt disabled regions
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 22 Jun 2011 19:47:02 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Moving the blk_sched_flush_plug() call out of the interrupt/preempt
disabled region in the scheduler allows us to replace

2
debian/patches/features/all/rt/block-use-cpu-chill.patch vendored
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@ -1,7 +1,7 @@
Subject: block: Use cpu_chill() for retry loops
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 20 Dec 2012 18:28:26 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/bug-rt-dependend-variants.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:58 -0500
Subject: bug: BUG_ON/WARN_ON variants dependend on RT/!RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Introduce RT/NON-RT WARN/BUG statements to avoid ifdefs in the code.

2
debian/patches/features/all/rt/cgroups-scheduling-while-atomic-in-cgroup-code.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Sat, 21 Jun 2014 10:09:48 +0200
Subject: memcontrol: Prevent scheduling while atomic in cgroup code
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
mm, memcg: make refill_stock() use get_cpu_light()

2
debian/patches/features/all/rt/cgroups-use-simple-wait-in-css_release.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
To avoid:
|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:914

2
debian/patches/features/all/rt/clockevents-drivers-timer-atmel-pit-fix-double-free_.patch vendored
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@ -1,7 +1,7 @@
From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Thu, 17 Mar 2016 21:09:43 +0100
Subject: [PATCH] clockevents/drivers/timer-atmel-pit: fix double free_irq
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
clockevents_exchange_device() changes the state from detached to shutdown
and so at that point the IRQ has not yet been requested.

2
debian/patches/features/all/rt/clocksource-tclib-allow-higher-clockrates.patch vendored
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@ -1,7 +1,7 @@
From: Benedikt Spranger <b.spranger@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/completion-use-simple-wait-queues.patch vendored
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@ -1,7 +1,7 @@
Subject: completion: Use simple wait queues
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 11 Jan 2013 11:23:51 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Completions have no long lasting callbacks and therefor do not need
the complex waitqueue variant. Use simple waitqueues which reduces the

2
debian/patches/features/all/rt/cond-resched-lock-rt-tweak.patch vendored
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@ -1,7 +1,7 @@
Subject: sched: Use the proper LOCK_OFFSET for cond_resched()
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 22:51:33 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
RT does not increment preempt count when a 'sleeping' spinlock is
locked. Update PREEMPT_LOCK_OFFSET for that case.

2
debian/patches/features/all/rt/cond-resched-softirq-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: sched: Take RT softirq semantics into account in cond_resched()
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Jul 2011 09:56:44 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
The softirq semantics work different on -RT. There is no SOFTIRQ_MASK in
the preemption counter which leads to the BUG_ON() statement in

2
debian/patches/features/all/rt/connector-cn_proc-Protect-send_msg-with-a-local-lock.patch vendored
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@ -2,7 +2,7 @@ From: Mike Galbraith <umgwanakikbuti@gmail.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/cpu-hotplug-Document-why-PREEMPT_RT-uses-a-spinlock.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org>
Date: Thu, 5 Dec 2013 09:16:52 -0500
Subject: cpu hotplug: Document why PREEMPT_RT uses a spinlock
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
The patch:

2
debian/patches/features/all/rt/cpu-rt-make-hotplug-lock-a-sleeping-spinlock-on-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: cpu: Make hotplug.lock a "sleeping" spinlock on RT
From: Steven Rostedt <rostedt@goodmis.org>
Date: Fri, 02 Mar 2012 10:36:57 -0500
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Tasks can block on hotplug.lock in pin_current_cpu(), but their state
might be != RUNNING. So the mutex wakeup will set the state

2
debian/patches/features/all/rt/cpu-rt-rework-cpu-down.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <srostedt@redhat.com>
Date: Mon, 16 Jul 2012 08:07:43 +0000
Subject: cpu/rt: Rework cpu down for PREEMPT_RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Bringing a CPU down is a pain with the PREEMPT_RT kernel because
tasks can be preempted in many more places than in non-RT. In

2
debian/patches/features/all/rt/cpu_chill-Add-a-UNINTERRUPTIBLE-hrtimer_nanosleep.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org>
Date: Tue, 4 Mar 2014 12:28:32 -0500
Subject: cpu_chill: Add a UNINTERRUPTIBLE hrtimer_nanosleep
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
We hit another bug that was caused by switching cpu_chill() from
msleep() to hrtimer_nanosleep().

2
debian/patches/features/all/rt/cpu_down_move_migrate_enable_back.patch vendored
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@ -1,7 +1,7 @@
From: Tiejun Chen <tiejun.chen@windriver.com>
Subject: cpu_down: move migrate_enable() back
Date: Thu, 7 Nov 2013 10:06:07 +0800
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Commit 08c1ab68, "hotplug-use-migrate-disable.patch", intends to
use migrate_enable()/migrate_disable() to replace that combination

2
debian/patches/features/all/rt/cpufreq-drop-K8-s-driver-from-beeing-selected.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Ralf posted a picture of a backtrace from

2
debian/patches/features/all/rt/cpumask-disable-offstack-on-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 14 Dec 2011 01:03:49 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
There are "valid" GFP_ATOMIC allocations such as

2
debian/patches/features/all/rt/cpuset-Convert-callback_lock-to-raw_spinlock_t.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <efault@gmx.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
The two commits below add up to a cpuset might_sleep() splat for RT:

2
debian/patches/features/all/rt/crypto-Reduce-preempt-disabled-regions-more-algos.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Don Estabrook reported
| kernel: WARNING: CPU: 2 PID: 858 at kernel/sched/core.c:2428 migrate_disable+0xed/0x100()

2
debian/patches/features/all/rt/debugobjects-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: debugobjects: Make RT aware
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 21:41:35 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Avoid filling the pool / allocating memory with irqs off().

4
debian/patches/features/all/rt/dm-make-rt-aware.patch vendored
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@ -1,7 +1,7 @@
Subject: dm: Make rt aware
From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 14 Nov 2011 23:06:09 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Use the BUG_ON_NORT variant for the irq_disabled() checks. RT has
interrupts legitimately enabled here as we cant deadlock against the
@ -16,7 +16,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -838,7 +838,7 @@ static void dm_old_request_fn(struct req
@@ -842,7 +842,7 @@ static void dm_old_request_fn(struct req
/* Establish tio->ti before queuing work (map_tio_request) */
tio->ti = ti;
kthread_queue_work(&md->kworker, &tio->work);

2
debian/patches/features/all/rt/drivers-block-zram-Replace-bit-spinlocks-with-rtmute.patch vendored
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@ -2,7 +2,7 @@ From: Mike Galbraith <umgwanakikbuti@gmail.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/drivers-net-8139-disable-irq-nosync.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:24 -0500
Subject: drivers/net: Use disable_irq_nosync() in 8139too
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Use disable_irq_nosync() instead of disable_irq() as this might be
called in atomic context with netpoll.

2
debian/patches/features/all/rt/drivers-net-vortex-fix-locking-issues.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org>
Date: Fri, 3 Jul 2009 08:30:00 -0500
Subject: drivers/net: vortex fix locking issues
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Argh, cut and paste wasn't enough...

2
debian/patches/features/all/rt/drivers-random-reduce-preempt-disabled-region.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:30 -0500
Subject: drivers: random: Reduce preempt disabled region
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
No need to keep preemption disabled across the whole function.

2
debian/patches/features/all/rt/drivers-tty-fix-omap-lock-crap.patch vendored
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@ -1,7 +1,7 @@
Subject: tty/serial/omap: Make the locking RT aware
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 28 Jul 2011 13:32:57 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/drivers-tty-pl011-irq-disable-madness.patch vendored
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@ -1,7 +1,7 @@
Subject: tty/serial/pl011: Make the locking work on RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 08 Jan 2013 21:36:51 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/drivers-zram-Don-t-disable-preemption-in-zcomp_strea.patch vendored
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@ -2,7 +2,7 @@ From: Mike Galbraith <umgwanakikbuti@gmail.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/drm-i915-drop-trace_i915_gem_ring_dispatch-onrt.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 25 Apr 2013 18:12:52 +0200
Subject: drm/i915: drop trace_i915_gem_ring_dispatch on rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
This tracepoint is responsible for:

2
debian/patches/features/all/rt/drmi915_Use_local_lockunlock_irq()_in_intel_pipe_update_startend().patch vendored
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@ -1,7 +1,7 @@
Subject: drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end()
From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Sat, 27 Feb 2016 09:01:42 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
[ 8.014039] BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:918

2
debian/patches/features/all/rt/drmradeoni915_Use_preempt_disableenable_rt()_where_recommended.patch vendored
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@ -1,7 +1,7 @@
Subject: drm,radeon,i915: Use preempt_disable/enable_rt() where recommended
From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Sat, 27 Feb 2016 08:09:11 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
DRM folks identified the spots, so use them.

2
debian/patches/features/all/rt/epoll-use-get-cpu-light.patch vendored
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@ -1,7 +1,7 @@
Subject: fs/epoll: Do not disable preemption on RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 08 Jul 2011 16:35:35 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/fs-aio-simple-simple-work.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/fs-block-rt-support.patch vendored
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@ -1,7 +1,7 @@
Subject: block: Turn off warning which is bogus on RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 14 Jun 2011 17:05:09 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
On -RT the context is always with IRQs enabled. Ignore this warning on -RT.

2
debian/patches/features/all/rt/fs-dcache-include-wait.h.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 14 Sep 2016 11:55:23 +0200
Subject: fs/dcache: include wait.h
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Since commit d9171b934526 ("parallel lookups machinery, part 4 (and
last)") dcache.h is using but does not include wait.h. It works as long

2
debian/patches/features/all/rt/fs-dcache-init-in_lookup_hashtable.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 14 Sep 2016 17:57:03 +0200
Subject: [PATCH] fs/dcache: init in_lookup_hashtable
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
in_lookup_hashtable was introduced in commit 94bdd655caba ("parallel
lookups machinery, part 3") and never initialized but since it is in

2
debian/patches/features/all/rt/fs-dcache-use-cpu-chill-in-trylock-loops.patch vendored
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@ -1,7 +1,7 @@
Subject: fs: dcache: Use cpu_chill() in trylock loops
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 07 Mar 2012 21:00:34 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/fs-dcache-use-swait_queue-instead-of-waitqueue.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/fs-jbd-replace-bh_state-lock.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
bit_spin_locks break under RT.

2
debian/patches/features/all/rt/fs-jbd2-pull-your-plug-when-waiting-for-space.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 17 Feb 2014 17:30:03 +0100
Subject: fs: jbd2: pull your plug when waiting for space
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Two cps in parallel managed to stall the the ext4 fs. It seems that
journal code is either waiting for locks or sleeping waiting for

2
debian/patches/features/all/rt/fs-namespace-preemption-fix.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 19 Jul 2009 08:44:27 -0500
Subject: fs: namespace preemption fix
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
On RT we cannot loop with preemption disabled here as
mnt_make_readonly() might have been preempted. We can safely enable

2
debian/patches/features/all/rt/fs-nfs-turn-rmdir_sem-into-a-semaphore.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/fs-ntfs-disable-interrupt-non-rt.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <efault@gmx.de>
Date: Fri, 3 Jul 2009 08:44:12 -0500
Subject: fs: ntfs: disable interrupt only on !RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
On Sat, 2007-10-27 at 11:44 +0200, Ingo Molnar wrote:
> * Nick Piggin <nickpiggin@yahoo.com.au> wrote:

2
debian/patches/features/all/rt/fs-replace-bh_uptodate_lock-for-rt.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Wrap the bit_spin_lock calls into a separate inline and add the RT
replacements with a real spinlock.

2
debian/patches/features/all/rt/ftrace-Fix-trace-header-alignment.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <umgwanakikbuti@gmail.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Line up helper arrows to the right column.

2
debian/patches/features/all/rt/ftrace-migrate-disable-tracing.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

2
debian/patches/features/all/rt/futex-Ensure-lock-unlock-symetry-versus-pi_lock-and-.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
In exit_pi_state_list() we have the following locking construct:

2
debian/patches/features/all/rt/futex-requeue-pi-fix.patch vendored
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@ -1,7 +1,7 @@
From: Steven Rostedt <rostedt@goodmis.org>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Requeue with timeout causes a bug with PREEMPT_RT_FULL.

2
debian/patches/features/all/rt/genirq-disable-irqpoll-on-rt.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Creates long latencies for no value

2
debian/patches/features/all/rt/genirq-do-not-invoke-the-affinity-callback-via-a-wor.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Joe Korty reported, that __irq_set_affinity_locked() schedules a
workqueue while holding a rawlock which results in a might_sleep()

2
debian/patches/features/all/rt/genirq-force-threading.patch vendored
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@ -1,7 +1,7 @@
Subject: genirq: Force interrupt thread on RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 03 Apr 2011 11:57:29 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Force threaded_irqs and optimize the code (force_irqthreads) in regard
to this.

2
debian/patches/features/all/rt/genirq-update-irq_set_irqchip_state-documentation.patch vendored
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@ -1,7 +1,7 @@
From: Josh Cartwright <joshc@ni.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/gpu_don_t_check_for_the_lock_owner.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 14 Jul 2015 14:26:34 +0200
Subject: gpu: don't check for the lock owner.
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---

2
debian/patches/features/all/rt/hotplug-Use-set_cpus_allowed_ptr-in-sync_unplug_thre.patch vendored
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@ -1,7 +1,7 @@
From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Tue, 24 Mar 2015 08:14:49 +0100
Subject: hotplug: Use set_cpus_allowed_ptr() in sync_unplug_thread()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
do_set_cpus_allowed() is not safe vs ->sched_class change.

2
debian/patches/features/all/rt/hotplug-light-get-online-cpus.patch vendored
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@ -1,7 +1,7 @@
Subject: hotplug: Lightweight get online cpus
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 15 Jun 2011 12:36:06 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
get_online_cpus() is a heavy weight function which involves a global
mutex. migrate_disable() wants a simpler construct which prevents only

2
debian/patches/features/all/rt/hotplug-sync_unplug-no-27-5cn-27-in-task-name.patch vendored
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@ -1,7 +1,7 @@
Subject: hotplug: sync_unplug: No "\n" in task name
From: Yong Zhang <yong.zhang0@gmail.com>
Date: Sun, 16 Oct 2011 18:56:43 +0800
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Otherwise the output will look a little odd.

2
debian/patches/features/all/rt/hotplug-use-migrate-disable.patch vendored
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@ -1,7 +1,7 @@
Subject: hotplug: Use migrate disable on unplug
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 19:35:29 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Migration needs to be disabled accross the unplug handling to make
sure that the unplug thread is off the unplugged cpu.

2
debian/patches/features/all/rt/hrtimer-Move-schedule_work-call-to-helper-thread.patch vendored
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@ -1,7 +1,7 @@
From: Yang Shi <yang.shi@windriver.com>
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/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
When run ltp leapsec_timer test, the following call trace is caught:

2
debian/patches/features/all/rt/hrtimer-enfore-64byte-alignment.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 23 Dec 2015 20:57:41 +0100
Subject: hrtimer: enfore 64byte alignment
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
The patch "hrtimer: Fixup hrtimer callback changes for preempt-rt" adds
a list_head expired to struct hrtimer_clock_base and with it we run into

2
debian/patches/features/all/rt/hrtimer-fixup-hrtimer-callback-changes-for-preempt-r.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 3 Jul 2009 08:44:31 -0500
Subject: hrtimer: Fixup hrtimer callback changes for preempt-rt
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
In preempt-rt we can not call the callbacks which take sleeping locks
from the timer interrupt context.

2
debian/patches/features/all/rt/hrtimers-prepare-full-preemption.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:29:34 -0500
Subject: hrtimers: Prepare full preemption
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Make cancellation of a running callback in softirq context safe
against preemption.

2
debian/patches/features/all/rt/i915-bogus-warning-from-i915-when-running-on-PREEMPT.patch vendored
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@ -1,7 +1,7 @@
From: Clark Williams <williams@redhat.com>
Date: Tue, 26 May 2015 10:43:43 -0500
Subject: i915: bogus warning from i915 when running on PREEMPT_RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
The i915 driver has a 'WARN_ON(!in_interrupt())' in the display
handler, which whines constanly on the RT kernel (since the interrupt

2
debian/patches/features/all/rt/ide-use-nort-local-irq-variants.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:30:16 -0500
Subject: ide: Do not disable interrupts for PREEMPT-RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Use the local_irq_*_nort variants.

2
debian/patches/features/all/rt/idr-use-local-lock-for-protection.patch vendored
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@ -1,7 +1,7 @@
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 14 Jul 2015 14:26:34 +0200
Subject: idr: Use local lock instead of preempt enable/disable
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
We need to protect the per cpu variable and prevent migration.

2
debian/patches/features/all/rt/infiniband-mellanox-ib-use-nort-irq.patch vendored
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@ -1,7 +1,7 @@
From: Sven-Thorsten Dietrich <sdietrich@novell.com>
Date: Fri, 3 Jul 2009 08:30:35 -0500
Subject: infiniband: Mellanox IB driver patch use _nort() primitives
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT
Kernel.

2
debian/patches/features/all/rt/inpt-gameport-use-local-irq-nort.patch vendored
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@ -1,7 +1,7 @@
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:30:16 -0500
Subject: input: gameport: Do not disable interrupts on PREEMPT_RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Use the _nort() primitives.

2
debian/patches/features/all/rt/introduce_migrate_disable_cpu_light.patch vendored
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@ -1,7 +1,7 @@
Subject: Intrduce migrate_disable() + cpu_light()
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 17 Jun 2011 15:42:38 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Introduce migrate_disable(). The task can't be pushed to another CPU but can
be preempted.

2
debian/patches/features/all/rt/iommu-amd--Use-WARN_ON_NORT.patch vendored
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@ -1,7 +1,7 @@
Subject: iommu/amd: Use WARN_ON_NORT in __attach_device()
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sat, 27 Feb 2016 10:22:23 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
RT does not disable interrupts here, but the protection is still
correct. Fixup the WARN_ON so it won't yell on RT.

2
debian/patches/features/all/rt/iommu-iova-don-t-disable-preempt-around-this_cpu_ptr.patch vendored
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@ -1,7 +1,7 @@
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 15 Sep 2016 16:58:19 +0200
Subject: [PATCH] iommu/iova: don't disable preempt around this_cpu_ptr()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Commit 583248e6620a ("iommu/iova: Disable preemption around use of
this_cpu_ptr()") disables preemption while accessing a per-CPU variable.

2
debian/patches/features/all/rt/iommu-vt-d-don-t-disable-preemption-while-accessing-.patch vendored
View File

@ -2,7 +2,7 @@ From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 15 Sep 2016 17:16:44 +0200
Subject: [PATCH] iommu/vt-d: don't disable preemption while accessing
deferred_flush()
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
get_cpu() disables preemption and returns the current CPU number. The
CPU number is later only used once while retrieving the address of the

2
debian/patches/features/all/rt/ipc-sem-rework-semaphore-wakeups.patch vendored
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@ -1,7 +1,7 @@
Subject: ipc/sem: Rework semaphore wakeups
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 14 Sep 2011 11:57:04 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Current sysv sems have a weird ass wakeup scheme that involves keeping
preemption disabled over a potential O(n^2) loop and busy waiting on

2
debian/patches/features/all/rt/irq-allow-disabling-of-softirq-processing-in-irq-thread-context.patch vendored
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@ -1,7 +1,7 @@
Subject: genirq: Allow disabling of softirq processing in irq thread context
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 31 Jan 2012 13:01:27 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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

2
debian/patches/features/all/rt/irqwork-Move-irq-safe-work-to-irq-context.patch vendored
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@ -1,7 +1,7 @@
Subject: irqwork: Move irq safe work to irq context
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 15 Nov 2015 18:40:17 +0100
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
On architectures where arch_irq_work_has_interrupt() returns false, we
end up running the irq safe work from the softirq context. That

2
debian/patches/features/all/rt/irqwork-push_most_work_into_softirq_context.patch vendored
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@ -1,7 +1,7 @@
Subject: irqwork: push most work into softirq context
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 23 Jun 2015 15:32:51 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.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.

2
debian/patches/features/all/rt/jump-label-rt.patch vendored
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@ -1,7 +1,7 @@
Subject: jump-label: disable if stop_machine() is used
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 08 Jul 2015 17:14:48 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.9-rt6.tar.xz
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9.13-rt10.tar.xz
Some architectures are using stop_machine() while switching the opcode which
leads to latency spikes.

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