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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-10-06 22:39:14 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-11-14 12:50:40 +0100 |
| commit | 4a6184ce7a48c478dee0d8a9ed74c1fa35161858 (patch) | |
| tree | 4b4b19673ade197de17614df11a2825410ca7baf /kernel | |
| parent | sched: Document wait_for_completion_*() return values (diff) | |
| download | linux-4a6184ce7a48c478dee0d8a9ed74c1fa35161858.tar.xz linux-4a6184ce7a48c478dee0d8a9ed74c1fa35161858.zip | |
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: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to '')
| -rw-r--r-- | kernel/sched_features.h | 1 | ||||
| -rw-r--r-- | kernel/sched_rt.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched_features.h b/kernel/sched_features.h index efa0a7b75dde..84802245abd2 100644 --- a/kernel/sched_features.h +++ b/kernel/sched_features.h @@ -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) diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index 056cbd2e2a27..583a1368afe6 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -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); |