From 390f3258cb2d031f1c17aa32e771ebd336e89073 Mon Sep 17 00:00:00 2001 From: Kirill Tkhai Date: Tue, 28 Jan 2014 11:26:14 +0400 Subject: [PATCH] sched/deadline: Skip in switched_to_dl() if task is current When p is current and it's not of dl class, then there are no other dl taks in the rq. If we had had pushable tasks in some other rq, they would have been pushed earlier. So, skip "p == rq->curr" case. Signed-off-by: Kirill Tkhai Acked-by: Juri Lelli Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/20140128072421.32315.25300.stgit@tkhai Signed-off-by: Ingo Molnar --- kernel/sched/deadline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 0dd5e0971a07..b5700bceee55 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1560,7 +1560,7 @@ static void switched_to_dl(struct rq *rq, struct task_struct *p) if (unlikely(p->dl.dl_throttled)) return; - if (p->on_rq || rq->curr != p) { + if (p->on_rq && rq->curr != p) { #ifdef CONFIG_SMP if (rq->dl.overloaded && push_dl_task(rq) && rq != task_rq(p)) /* Only reschedule if pushing failed */