Commit cd660911 authored Oct 31, 2014 by Wanpeng Li Committed by Ingo Molnar Nov 04, 2014

sched/deadline: Reschedule from switched_from_dl() after a successful pull



In switched_from_dl() we have to issue a resched if we successfully
pulled some task from other cpus. This patch also aligns the behavior
with -rt.

Suggested-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1414708776-124078-5-git-send-email-wanpeng.li@linux.intel.com


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

parent 6b0a563f

kernel/sched/deadline.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -1643,8 +1643,11 @@ static void switched_from_dl(struct rq rq, struct task_struct p)
		* this is the right place to try to pull some other one
		* from an overloaded cpu, if any.
		*/
		if (!rq->dl.dl_nr_running)
		pull_dl_task(rq);
		if (!task_on_rq_queued(p) \|\| rq->dl.dl_nr_running)
		return;

		if (pull_dl_task(rq))
		resched_curr(rq);
		#endif
		}