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sched: add schedule_timeout_idle()

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This will be needed in the patch "mm, oom: introduce oom reaper".

Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2016-03-25 14:20:21 -07:00 committed by Linus Torvalds
parent 1701f68040
commit 69b27baf00
2 changed files with 12 additions and 0 deletions
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1
include/linux/sched.h
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@ -426,6 +426,7 @@ extern signed long schedule_timeout(signed long timeout);
extern signed long schedule_timeout_interruptible(signed long timeout); extern signed long schedule_timeout_interruptible(signed long timeout);
extern signed long schedule_timeout_killable(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_uninterruptible(signed long timeout);
extern signed long schedule_timeout_idle(signed long timeout);
asmlinkage void schedule(void); asmlinkage void schedule(void);
extern void schedule_preempt_disabled(void); extern void schedule_preempt_disabled(void);

11
kernel/time/timer.c
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@ -1566,6 +1566,17 @@ signed long __sched schedule_timeout_uninterruptible(signed long timeout)
} }
EXPORT_SYMBOL(schedule_timeout_uninterruptible); 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 #ifdef CONFIG_HOTPLUG_CPU
static void migrate_timer_list(struct tvec_base *new_base, struct hlist_head *head) static void migrate_timer_list(struct tvec_base *new_base, struct hlist_head *head)
{ {