Commit cdc8eb98 authored Jan 25, 2008 by Gregory Haskins Committed by Ingo Molnar Jan 25, 2008

sched: RT-balance, only adjust overload state when changing



The overload set/clears were originally idempotent when this logic was first
implemented.  But that is no longer true due to the addition of the atomic
counter and this logic was never updated to work properly with that change.
So only adjust the overload state if it is actually changing to avoid
getting out of sync.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent cb469845

kernel/sched_rt.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -34,9 +34,11 @@ static inline void rt_clear_overload(struct rq *rq)
		static void update_rt_migration(struct rq *rq)
		{
		if (rq->rt.rt_nr_migratory && (rq->rt.rt_nr_running > 1)) {
		if (!rq->rt.overloaded) {
		rt_set_overload(rq);
		rq->rt.overloaded = 1;
		} else {
		}
		} else if (rq->rt.overloaded) {
		rt_clear_overload(rq);
		rq->rt.overloaded = 0;
		}

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