diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 6b800a14b990..f936552b3db1 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2907,7 +2907,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_ * Batch and idle tasks do not preempt non-idle tasks (their preemption * is driven by the tick): */ - if (unlikely(p->policy != SCHED_NORMAL)) + if (unlikely(p->policy != SCHED_NORMAL) || !sched_feat(WAKEUP_PREEMPTION)) return; find_matching_se(&se, &pse); diff --git a/kernel/sched/features.h b/kernel/sched/features.h index eebefcad7027..e68e69ab917d 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -31,6 +31,11 @@ SCHED_FEAT(LAST_BUDDY, true) */ SCHED_FEAT(CACHE_HOT_BUDDY, true) +/* + * Allow wakeup-time preemption of the current task: + */ +SCHED_FEAT(WAKEUP_PREEMPTION, true) + /* * Use arch dependent cpu power functions */