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Commit 6f0d5c390e4206dcb3804a5072a048fdb7d2b428

Authored by Peter Zijlstra
Committed by Ingo Molnar
1 parent af4491e516
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

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>

Showing 1 changed file with 5 additions and 6 deletions Side-by-side Diff

... ... @@ -438,9 +438,6 @@
438 438 {
439 439 u64 runtime = sched_rt_runtime(rt_rq);
440 440  
441   - if (runtime == RUNTIME_INF)
442   - return 0;
443   -
444 441 if (rt_rq->rt_throttled)
445 442 return rt_rq_throttled(rt_rq);
446 443  
... ... @@ -491,9 +488,11 @@
491 488 rt_rq = rt_rq_of_se(rt_se);
492 489  
493 490 spin_lock(&rt_rq->rt_runtime_lock);
494   - rt_rq->rt_time += delta_exec;
495   - if (sched_rt_runtime_exceeded(rt_rq))
496   - resched_task(curr);
  491 + if (sched_rt_runtime(rt_rq) != RUNTIME_INF) {
  492 + rt_rq->rt_time += delta_exec;
  493 + if (sched_rt_runtime_exceeded(rt_rq))
  494 + resched_task(curr);
  495 + }
497 496 spin_unlock(&rt_rq->rt_runtime_lock);
498 497 }
499 498 }