From f540a6080a092e2ab69fd146c308022db7347b0a Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sat, 15 Mar 2008 17:10:34 +0100 Subject: [PATCH] sched: wakeup-buddy tasks are cache-hot Wakeup-buddy tasks are cache-hot - this makes it a bit harder for the load-balancer to tear them apart. (but it's still possible, if the load is sufficiently assymetric) Signed-off-by: Ingo Molnar --- kernel/sched.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/kernel/sched.c b/kernel/sched.c index adbd475cfd25..3f7c5eb254e2 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1396,6 +1396,12 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd) { s64 delta; + /* + * Buddy candidates are cache hot: + */ + if (&p->se == cfs_rq_of(&p->se)->next) + return 1; + if (p->sched_class != &fair_sched_class) return 0;