diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index f3306d3f2aa1..5b7f378af042 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6826,9 +6826,11 @@ static void __sched notrace __schedule(int sched_mode) pick_again: next = pick_next_task(rq, rq->donor, &rf); - rq_set_donor(rq, next); rq->next_class = next->sched_class; if (sched_proxy_exec()) { + struct task_struct *prev_donor = rq->donor; + + rq_set_donor(rq, next); if (unlikely(next->blocked_on)) { next = find_proxy_task(rq, next, &rf); if (!next) @@ -6836,7 +6838,27 @@ pick_again: if (next == rq->idle) goto keep_resched; } + if (rq->donor == prev_donor && prev != next) { + struct task_struct *donor = rq->donor; + /* + * When transitioning like: + * + * prev next + * donor: B B + * curr: A B or C + * + * then put_prev_set_next_task() will not have done + * anything, since B == B. However, A might have + * missed a RT/DL balance opportunity due to being + * on_cpu. + */ + donor->sched_class->put_prev_task(rq, donor, donor); + donor->sched_class->set_next_task(rq, donor, true); + } + } else { + rq_set_donor(rq, next); } + picked: clear_tsk_need_resched(prev); clear_preempt_need_resched(); |