From: Kirill Tkhai <tkhai@yandex.ru>
Date: Thu, 22 Nov 2012 20:02:15 +0000 (+0400)
Subject: sched/rt: Add reschedule check to switched_from_rt()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1158ddb55416855fd17abe3214298f736f00426a;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

sched/rt: Add reschedule check to switched_from_rt()

Reschedule rq->curr if the first RT task has just been
pulled to the rq.

Signed-off-by: Kirill V Tkhai <tkhai@yandex.ru>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tkhai Kirill <tkhai@yandex.ru>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/118761353614535@web28f.yandex.ru
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 418feb01344e..29bda5bdf2a5 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1889,8 +1889,11 @@ static void switched_from_rt(struct rq *rq, struct task_struct *p)
 	 * we may need to handle the pulling of RT tasks
 	 * now.
 	 */
-	if (p->on_rq && !rq->rt.rt_nr_running)
-		pull_rt_task(rq);
+	if (!p->on_rq || rq->rt.rt_nr_running)
+		return;
+
+	if (pull_rt_task(rq))
+		resched_task(rq->curr);
 }
 
 void init_sched_rt_class(void)