sched: rt-bandwidth accounting fix (cc2991cf) · Commits · 戴 / test

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>

kernel/sched_rt.c

+5 −6

Original line number	Diff line number	Diff line
		@@ -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);
		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);
		}
		}

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