diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/fair.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 967e77faef5..abb602575be 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1840,6 +1840,17 @@ static int select_best_cpu(struct task_struct *p, int target, int reason, int small_task = is_small_task(p); int boost = sched_boost(); int cstate, min_cstate = INT_MAX; + int prefer_idle = reason ? 1 : sysctl_sched_prefer_idle; + + /* + * PF_WAKE_UP_IDLE is a hint to scheduler that the thread waking up + * (p) needs to be placed on idle cpu. + */ + if ((current->flags & PF_WAKE_UP_IDLE) || + (p->flags & PF_WAKE_UP_IDLE)) { + prefer_idle = 1; + small_task = 0; + } trace_sched_task_load(p, small_task, boost, reason, sync); @@ -1950,7 +1961,7 @@ static int select_best_cpu(struct task_struct *p, int target, int reason, } if (min_cstate_cpu >= 0 && - (sysctl_sched_prefer_idle || + (prefer_idle || !(best_cpu >= 0 && mostly_idle_cpu_sync(best_cpu, sync)))) best_cpu = min_cstate_cpu; done: |