76 lines
2.9 KiB
Diff
76 lines
2.9 KiB
Diff
From 17e8b2696494bfeee71425d3acac4608ac97b45d Mon Sep 17 00:00:00 2001
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From: Yang Shi <yang.shi@windriver.com>
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Date: Wed, 30 Oct 2013 11:48:33 -0700
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Subject: [PATCH 084/290] mm/memcontrol: Don't call schedule_work_on in
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preemption disabled context
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.94-rt38.tar.xz
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The following trace is triggered when running ltp oom test cases:
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BUG: sleeping function called from invalid context at kernel/rtmutex.c:659
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in_atomic(): 1, irqs_disabled(): 0, pid: 17188, name: oom03
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Preemption disabled at:[<ffffffff8112ba70>] mem_cgroup_reclaim+0x90/0xe0
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CPU: 2 PID: 17188 Comm: oom03 Not tainted 3.10.10-rt3 #2
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Hardware name: Intel Corporation Calpella platform/MATXM-CORE-411-B, BIOS 4.6.3 08/18/2010
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ffff88007684d730 ffff880070df9b58 ffffffff8169918d ffff880070df9b70
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ffffffff8106db31 ffff88007688b4a0 ffff880070df9b88 ffffffff8169d9c0
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ffff88007688b4a0 ffff880070df9bc8 ffffffff81059da1 0000000170df9bb0
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Call Trace:
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[<ffffffff8169918d>] dump_stack+0x19/0x1b
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[<ffffffff8106db31>] __might_sleep+0xf1/0x170
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[<ffffffff8169d9c0>] rt_spin_lock+0x20/0x50
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[<ffffffff81059da1>] queue_work_on+0x61/0x100
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[<ffffffff8112b361>] drain_all_stock+0xe1/0x1c0
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[<ffffffff8112ba70>] mem_cgroup_reclaim+0x90/0xe0
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[<ffffffff8112beda>] __mem_cgroup_try_charge+0x41a/0xc40
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[<ffffffff810f1c91>] ? release_pages+0x1b1/0x1f0
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[<ffffffff8106f200>] ? sched_exec+0x40/0xb0
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[<ffffffff8112cc87>] mem_cgroup_charge_common+0x37/0x70
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[<ffffffff8112e2c6>] mem_cgroup_newpage_charge+0x26/0x30
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[<ffffffff8110af68>] handle_pte_fault+0x618/0x840
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[<ffffffff8103ecf6>] ? unpin_current_cpu+0x16/0x70
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[<ffffffff81070f94>] ? migrate_enable+0xd4/0x200
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[<ffffffff8110cde5>] handle_mm_fault+0x145/0x1e0
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[<ffffffff810301e1>] __do_page_fault+0x1a1/0x4c0
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[<ffffffff8169c9eb>] ? preempt_schedule_irq+0x4b/0x70
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[<ffffffff8169e3b7>] ? retint_kernel+0x37/0x40
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[<ffffffff8103053e>] do_page_fault+0xe/0x10
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[<ffffffff8169e4c2>] page_fault+0x22/0x30
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So, to prevent schedule_work_on from being called in preempt disabled context,
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replace the pair of get/put_cpu() to get/put_cpu_light().
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Signed-off-by: Yang Shi <yang.shi@windriver.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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mm/memcontrol.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/mm/memcontrol.c b/mm/memcontrol.c
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index 3a3d109dce21..cf9e81fb342d 100644
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--- a/mm/memcontrol.c
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+++ b/mm/memcontrol.c
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@@ -2082,7 +2082,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg)
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* as well as workers from this path always operate on the local
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* per-cpu data. CPU up doesn't touch memcg_stock at all.
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*/
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- curcpu = get_cpu();
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+ curcpu = get_cpu_light();
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for_each_online_cpu(cpu) {
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struct memcg_stock_pcp *stock = &per_cpu(memcg_stock, cpu);
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struct mem_cgroup *memcg;
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@@ -2102,7 +2102,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg)
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}
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css_put(&memcg->css);
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}
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- put_cpu();
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+ put_cpu_light();
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mutex_unlock(&percpu_charge_mutex);
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}
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--
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2.24.1
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