From a7558e01056f5191ff2ecff53b075dcb9e484188 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Mon, 14 Sep 2009 20:02:34 +0200 Subject: sched: Add WF_FORK Avoid the cache buddies from biasing the time distribution away from fork()ers. Normally the next buddy will be the preferred scheduling target, but this makes fork()s prefer to run the new child, whereas we prefer to run the parent, since that will generate more work. Signed-off-by: Peter Zijlstra LKML-Reference: Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/sched_fair.c') diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 007958e3c93a..6766959c7f44 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1580,7 +1580,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int flags */ if (sched_feat(LAST_BUDDY) && likely(se->on_rq && curr != rq->idle)) set_last_buddy(se); - if (sched_feat(NEXT_BUDDY)) + if (sched_feat(NEXT_BUDDY) && !(flags & WF_FORK)) set_next_buddy(pse); /* -- cgit v1.2.3