From: Kirill Tkhai <ktkhai@parallels.com>
Date: Thu, 6 Mar 2014 15:16:15 +0000 (+0400)
Subject: sched/fair: Fix endless loop in idle_balance()
X-Git-Tag: v4.14-rc1~7852^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=35805ff8f4fc535ac85330170d3c56829c87c677;p=platform%2Fkernel%2Flinux-rpi.git

sched/fair: Fix endless loop in idle_balance()

Check for fair tasks number to decide, that we've pulled a task.
rq's nr_running may contain throttled RT tasks.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1394118975.19290.104.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 10db4a8..f1eedae 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6710,7 +6710,7 @@ static int idle_balance(struct rq *this_rq)
 	 * While browsing the domains, we released the rq lock.
 	 * A task could have be enqueued in the meantime
 	 */
-	if (this_rq->nr_running && !pulled_task) {
+	if (this_rq->cfs.h_nr_running && !pulled_task) {
 		pulled_task = 1;
 		goto out;
 	}