Commit 390f3258 authored Jan 28, 2014 by Kirill Tkhai Committed by Ingo Molnar Feb 09, 2014

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 <ktkhai@parallels.com>
Acked-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140128072421.32315.25300.stgit@tkhai


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent eaa4e4fc

kernel/sched/deadline.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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 */