diff options
| author | Linus Torvalds | 2021-09-12 11:37:41 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2021-09-12 11:37:41 -0700 |
| commit | 56c244382fdb793986097df8e29f9f9320bc2c60 (patch) | |
| tree | 6f61adff1da1224a0357941a869fca6625efbf30 | |
| parent | 165d05d88c27697fe444a6eae4f3882834ef8826 (diff) | |
| parent | 868ad33bfa3bf39960982682ad3a0f8ebda1656e (diff) | |
Merge tag 'sched_urgent_for_v5.15_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Borislav Petkov:
- Make sure the idle timer expires in hardirq context, on PREEMPT_RT
- Make sure the run-queue balance callback is invoked only on the
outgoing CPU
* tag 'sched_urgent_for_v5.15_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched: Prevent balance_push() on remote runqueues
sched/idle: Make the idle timer expire in hard interrupt context
| -rw-r--r-- | kernel/sched/core.c | 6 | ||||
| -rw-r--r-- | kernel/sched/idle.c | 4 |
2 files changed, 5 insertions, 5 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index c4462c454ab9..1bba4128a3e6 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -8836,7 +8836,6 @@ static void balance_push(struct rq *rq) struct task_struct *push_task = rq->curr; lockdep_assert_rq_held(rq); - SCHED_WARN_ON(rq->cpu != smp_processor_id()); /* * Ensure the thing is persistent until balance_push_set(.on = false); @@ -8844,9 +8843,10 @@ static void balance_push(struct rq *rq) rq->balance_callback = &balance_push_callback; /* - * Only active while going offline. + * Only active while going offline and when invoked on the outgoing + * CPU. */ - if (!cpu_dying(rq->cpu)) + if (!cpu_dying(rq->cpu) || rq != this_rq()) return; /* diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 912b47aa99d8..d17b0a5ce6ac 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -379,10 +379,10 @@ void play_idle_precise(u64 duration_ns, u64 latency_ns) cpuidle_use_deepest_state(latency_ns); it.done = 0; - hrtimer_init_on_stack(&it.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_init_on_stack(&it.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD); it.timer.function = idle_inject_timer_fn; hrtimer_start(&it.timer, ns_to_ktime(duration_ns), - HRTIMER_MODE_REL_PINNED); + HRTIMER_MODE_REL_PINNED_HARD); while (!READ_ONCE(it.done)) do_idle(); |