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Commit 4a6184ce authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
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sched, rt: Provide means of disabling cross-cpu bandwidth sharing 



Normally the RT bandwidth scheme will share bandwidth across the
entire root_domain. However sometimes its convenient to disable this
sharing for debug purposes. Provide a simple feature switch to this
end.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent c6dc7f05

kernel/sched_features.h

+1 −0
Original line number Diff line number Diff line
@@ -67,3 +67,4 @@ SCHED_FEAT(NONTASK_POWER, 1) 
SCHED_FEAT(TTWU_QUEUE, 1)



SCHED_FEAT(FORCE_SD_OVERLAP, 0)

SCHED_FEAT(RT_RUNTIME_SHARE, 1)

kernel/sched_rt.c

+3 −0
Original line number Diff line number Diff line
@@ -560,6 +560,9 @@ static int balance_runtime(struct rt_rq *rt_rq) 
{

	int more = 0;



	if (!sched_feat(RT_RUNTIME_SHARE))

		return more;



	if (rt_rq->rt_time > rt_rq->rt_runtime) {

		raw_spin_unlock(&rt_rq->rt_runtime_lock);

		more = do_balance_runtime(rt_rq);