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sched: Complete buddy switches

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Add a NEXT_BUDDY feature flag to aid in debugging.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Galbraith 2009-09-11 12:01:17 +02:00 committed by Ingo Molnar
parent e6b1b2c9c0
commit 3cb63d527f
2 changed files with 3 additions and 1 deletions
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3
kernel/sched_fair.c
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@ -1501,7 +1501,8 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int sync)
*/
if (sched_feat(LAST_BUDDY) && likely(se->on_rq && curr != rq->idle))
set_last_buddy(se);
set_next_buddy(pse);
if (sched_feat(NEXT_BUDDY))
set_next_buddy(pse);
/*
* We can come here with TIF_NEED_RESCHED already set from new task

1
kernel/sched_features.h
View file

@ -14,5 +14,6 @@ SCHED_FEAT(LB_WAKEUP_UPDATE, 1)
SCHED_FEAT(ASYM_EFF_LOAD, 1)
SCHED_FEAT(WAKEUP_SYNC, 0)
SCHED_FEAT(WAKEUP_OVERLAP, 0)
SCHED_FEAT(NEXT_BUDDY, 1)
SCHED_FEAT(LAST_BUDDY, 1)
SCHED_FEAT(OWNER_SPIN, 1)