From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 19 Jun 2008 12:22:28 +0000 (+0200)
Subject: sched: rt: dont stop the period timer when there are tasks wanting to run
X-Git-Tag: v2.6.26-rc8~11^2~3
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a8cde163ea724baf74e7752a31a69d3121a240e;p=linux-2.6

sched: rt: dont stop the period timer when there are tasks wanting to run

So if the group ever gets throttled, it will never wake up again.

Reported-by: "Daniel K." <dk@uw.no>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Daniel K. <dk@uw.no>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 1dad5bbb59..0f3c19197f 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -250,7 +250,8 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
 			if (rt_rq->rt_time || rt_rq->rt_nr_running)
 				idle = 0;
 			spin_unlock(&rt_rq->rt_runtime_lock);
-		}
+		} else if (rt_rq->rt_nr_running)
+			idle = 0;
 
 		if (enqueue)
 			sched_rt_rq_enqueue(rt_rq);