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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-19 10:33:03 (GMT)
committerIngo Molnar <mingo@elte.hu>2008-08-28 11:42:38 (GMT)
commitcc2991cf15ae92fa30b3ea9f56a8a5a337bd33c7 (patch)
treea286839539678bb2b36e7e059b50a2e575e93782 /kernel
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>
Diffstat (limited to 'kernel')
-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 07d9b33..5523107 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);
}
}