diff options
| author | Venkatesh Pallipadi <venki@google.com> | 2011-03-01 16:28:21 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-03-04 11:14:31 +0100 |
| commit | 6d1cafd8b56ea726c10a5a104de57cc3ed8fa953 (patch) | |
| tree | 638ba81859114b2bda8b4899cf73cc20a8a31553 /kernel/sched.c | |
| parent | c02aa73b1d18e43cfd79c2f193b225e84ca497c8 (diff) | |
sched: Resched proper CPU on yield_to()
yield_to_task_fair() has code to resched the CPU of yielding task when the
intention is to resched the CPU of the task that is being yielded to.
Change here fixes the problem and also makes the resched conditional on
rq != p_rq.
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1299025701-22168-1-git-send-email-venki@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index f3030709d82..61452e86c73 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -5522,8 +5522,15 @@ again: goto out; yielded = curr->sched_class->yield_to_task(rq, p, preempt); - if (yielded) + if (yielded) { schedstat_inc(rq, yld_count); + /* + * Make p's CPU reschedule; pick_next_entity takes care of + * fairness. + */ + if (preempt && rq != p_rq) + resched_task(p_rq->curr); + } out: double_rq_unlock(rq, p_rq); |