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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-09-14 20:02:34 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-15 16:51:31 +0200
commita7558e01056f5191ff2ecff53b075dcb9e484188 (patch)
tree1364bbf9273ce353f4f3146aebe567f79b7c8cad /kernel/sched_fair.c
parent7d47872146398dbede13223299fe1cb368ebc781 (diff)
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 <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
-rw-r--r--kernel/sched_fair.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 007958e3c93..6766959c7f4 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);
/*