commit 8a8cde163ea724baf74e7752a31a69d3121a240e
author Peter Zijlstra <a.p.zijlstra@chello.nl> Thu Jun 19 14:22:28 2008 +0200
committer Ingo Molnar <mingo@elte.hu> Fri Jun 20 11:00:19 2008 +0200
tree 5cdeed8a13ac27bf0bf03f522ab184c543a5030f
parent d4abc238c9f4df8b3216f3e883f5d0a07b7ac75a

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>

kernel/sched_rt.c

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 1dad5bb..0f3c191 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -250,7 +250,8 @@
 			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);