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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-19 10:03:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-19 10:03:55 -0700 |
| commit | 893e2c5c9fedeccf89653b0ad17df69e88dbd707 (patch) | |
| tree | 93ad9b19f49d6449e0155a5c7bb8d3040d883e24 /kernel | |
| parent | 8a1e377e55f2dca5c689926313beeaa8ac2adb22 (diff) | |
| parent | b5a9b340789b2b24c6896bcf7a065c31a4db671c (diff) | |
| download | linux-893e2c5c9fedeccf89653b0ad17df69e88dbd707.tar.bz2 | |
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"This fixes a group scheduling related performance/interactivity
regression introduced in v4.8, which affects certain hardware
environments where cpu_possible_mask != cpu_present_mask"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Fix incorrect task group ->load_avg
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/fair.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 76ee7de1859d..d941c97dfbc3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -690,7 +690,14 @@ void init_entity_runnable_average(struct sched_entity *se) * will definitely be update (after enqueue). */ sa->period_contrib = 1023; - sa->load_avg = scale_load_down(se->load.weight); + /* + * Tasks are intialized with full load to be seen as heavy tasks until + * they get a chance to stabilize to their real load level. + * Group entities are intialized with zero load to reflect the fact that + * nothing has been attached to the task group yet. + */ + if (entity_is_task(se)) + sa->load_avg = scale_load_down(se->load.weight); sa->load_sum = sa->load_avg * LOAD_AVG_MAX; /* * At this point, util_avg won't be used in select_task_rq_fair anyway |