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sched/ext: Fix scx vs sched_delayed

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Commit 98442f0ccd ("sched: Fix delayed_dequeue vs
switched_from_fair()") forgot about scx :/

Fixes: 98442f0ccd ("sched: Fix delayed_dequeue vs switched_from_fair()")
Reported-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lkml.kernel.org/r/20241030104934.GK14555@noisy.programming.kicks-ass.net
This commit is contained in:
Peter Zijlstra 2024-10-30 11:49:34 +01:00
parent 5db91545ef
commit 69d5e722be
1 changed files with 12 additions and 2 deletions
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14
kernel/sched/ext.c
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@ -4489,11 +4489,16 @@ static void scx_ops_disable_workfn(struct kthread_work *work)
scx_task_iter_start(&sti);
while ((p = scx_task_iter_next_locked(&sti))) {
const struct sched_class *old_class = p->sched_class;
const struct sched_class *new_class =
__setscheduler_class(p->policy, p->prio);
struct sched_enq_and_set_ctx ctx;
if (old_class != new_class && p->se.sched_delayed)
dequeue_task(task_rq(p), p, DEQUEUE_SLEEP | DEQUEUE_DELAYED);
sched_deq_and_put_task(p, DEQUEUE_SAVE | DEQUEUE_MOVE, &ctx);
p->sched_class = __setscheduler_class(p->policy, p->prio);
p->sched_class = new_class;
check_class_changing(task_rq(p), p, old_class);
sched_enq_and_set_task(&ctx);
@ -5199,12 +5204,17 @@ static int scx_ops_enable(struct sched_ext_ops *ops, struct bpf_link *link)
scx_task_iter_start(&sti);
while ((p = scx_task_iter_next_locked(&sti))) {
const struct sched_class *old_class = p->sched_class;
const struct sched_class *new_class =
__setscheduler_class(p->policy, p->prio);
struct sched_enq_and_set_ctx ctx;
if (old_class != new_class && p->se.sched_delayed)
dequeue_task(task_rq(p), p, DEQUEUE_SLEEP | DEQUEUE_DELAYED);
sched_deq_and_put_task(p, DEQUEUE_SAVE | DEQUEUE_MOVE, &ctx);
p->scx.slice = SCX_SLICE_DFL;
p->sched_class = __setscheduler_class(p->policy, p->prio);
p->sched_class = new_class;
check_class_changing(task_rq(p), p, old_class);
sched_enq_and_set_task(&ctx);