Messages in this thread Patch in this message | | | Date | Fri, 18 Dec 2015 13:14:00 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 1/2] mm, oom: introduce oom reaper |
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On Fri, 18 Dec 2015 12:54:55 +0100 Michal Hocko <mhocko@kernel.org> wrote:
> /* Retry the down_read_trylock(mmap_sem) a few times */ > - while (attempts++ < 10 && !__oom_reap_vmas(mm)) > - msleep_interruptible(100); > + while (attempts++ < 10 && !__oom_reap_vmas(mm)) { > + __set_task_state(current, TASK_IDLE); > + schedule_timeout(HZ/10); > + }
If you won't, I shall ;)
From: Andrew Morton <akpm@linux-foundation.org> Subject: sched: add schedule_timeout_idle()
This will be needed in the patch "mm, oom: introduce oom reaper".
Cc: Michal Hocko <mhocko@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> ---
include/linux/sched.h | 1 + kernel/time/timer.c | 11 +++++++++++ 2 files changed, 12 insertions(+)
diff -puN kernel/time/timer.c~sched-add-schedule_timeout_idle kernel/time/timer.c --- a/kernel/time/timer.c~sched-add-schedule_timeout_idle +++ a/kernel/time/timer.c @@ -1566,6 +1566,17 @@ signed long __sched schedule_timeout_uni } EXPORT_SYMBOL(schedule_timeout_uninterruptible); +/* + * Like schedule_timeout_uninterruptible(), except this task will not contribute + * to load average. + */ +signed long __sched schedule_timeout_idle(signed long timeout) +{ + __set_current_state(TASK_IDLE); + return schedule_timeout(timeout); +} +EXPORT_SYMBOL(schedule_timeout_idle); + #ifdef CONFIG_HOTPLUG_CPU static void migrate_timer_list(struct tvec_base *new_base, struct hlist_head *head) { diff -puN include/linux/sched.h~sched-add-schedule_timeout_idle include/linux/sched.h --- a/include/linux/sched.h~sched-add-schedule_timeout_idle +++ a/include/linux/sched.h @@ -423,6 +423,7 @@ extern signed long schedule_timeout(sign extern signed long schedule_timeout_interruptible(signed long timeout); extern signed long schedule_timeout_killable(signed long timeout); extern signed long schedule_timeout_uninterruptible(signed long timeout); +extern signed long schedule_timeout_idle(signed long timeout); asmlinkage void schedule(void); extern void schedule_preempt_disabled(void); _
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