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Commit 3cb63d52 authored Sep 11, 2009 by Mike Galbraith Committed by Ingo Molnar Sep 15, 2009

sched: Complete buddy switches



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>

parent e6b1b2c9

kernel/sched_fair.c

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1501,6 +1501,7 @@ 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))		if (sched_feat(LAST_BUDDY) && likely(se->on_rq && curr != rq->idle))
	set_last_buddy(se);		set_last_buddy(se);
			if (sched_feat(NEXT_BUDDY))
	set_next_buddy(pse);		set_next_buddy(pse);

	/*		/*

kernel/sched_features.h

+1 −0

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