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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-19 14:33:03 +0400
committerIngo Molnar <mingo@elte.hu>2008-08-28 15:42:38 +0400
commitcc2991cf15ae92fa30b3ea9f56a8a5a337bd33c7 (patch)
treea286839539678bb2b36e7e059b50a2e575e93782
parentf3ade837808121ff8bab9c56725f4fe40ec85a56 (diff)
downloadlinux-cc2991cf15ae92fa30b3ea9f56a8a5a337bd33c7.tar.xz
sched: rt-bandwidth accounting fix
It fixes an accounting bug where we would continue accumulating runtime even though the bandwidth control is disabled. This would lead to very long throttle periods once bandwidth control gets turned on again. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/sched_rt.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 07d9b3307907..552310798dad 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -440,9 +440,6 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
{
u64 runtime = sched_rt_runtime(rt_rq);
- if (runtime == RUNTIME_INF)
- return 0;
-
if (rt_rq->rt_throttled)
return rt_rq_throttled(rt_rq);
@@ -493,9 +490,11 @@ static void update_curr_rt(struct rq *rq)
rt_rq = rt_rq_of_se(rt_se);
spin_lock(&rt_rq->rt_runtime_lock);
- rt_rq->rt_time += delta_exec;
- if (sched_rt_runtime_exceeded(rt_rq))
- resched_task(curr);
+ if (sched_rt_runtime(rt_rq) != RUNTIME_INF) {
+ rt_rq->rt_time += delta_exec;
+ if (sched_rt_runtime_exceeded(rt_rq))
+ resched_task(curr);
+ }
spin_unlock(&rt_rq->rt_runtime_lock);
}
}