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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-09-14 20:02:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 16:51:31 +0200 |
| commit | a7558e01056f5191ff2ecff53b075dcb9e484188 (patch) | |
| tree | 1364bbf9273ce353f4f3146aebe567f79b7c8cad /kernel/sched_fair.c | |
| parent | 7d47872146398dbede13223299fe1cb368ebc781 (diff) | |
| download | linux-a7558e01056f5191ff2ecff53b075dcb9e484188.tar.gz linux-a7558e01056f5191ff2ecff53b075dcb9e484188.tar.bz2 linux-a7558e01056f5191ff2ecff53b075dcb9e484188.zip | |
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.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); /* |