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Commit 17b3279b authored by Gregory Haskins's avatar Gregory Haskins Committed by Ingo Molnar
Browse files

sched: break out early if RT task cannot be migrated 



We don't need to bother searching if the task cannot be migrated

Signed-off-by: default avatarGregory Haskins <ghaskins@novell.com>
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent e1f47d89

kernel/sched_rt.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -176,7 +176,8 @@ static int select_task_rq_rt(struct task_struct *p, int sync) 
	 * that is just being woken and probably will have

	 * that is just being woken and probably will have

	 * cold cache anyway.

	 * cold cache anyway.

	 */

	 */

	if (unlikely(rt_task(rq->curr))) {

	if (unlikely(rt_task(rq->curr)) &&

	    (p->nr_cpus_allowed > 1)) {

		int cpu = find_lowest_rq(p);

		int cpu = find_lowest_rq(p);





		return (cpu == -1) ? task_cpu(p) : cpu;

		return (cpu == -1) ? task_cpu(p) : cpu;