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sched: Switch rq->next_class on proxy_resched_idle()

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K Prateek noticed we weren't setting the rq->next_class in
proxy_resched_idle(), when I was debugging an issue seen with
CONFIG_SCHED_PROXY_EXEC and some of Peter's new patches, and
suggested this fix.

So set rq->next_class when we temporarily switch the donor to
idle, so we don't accidentally call wakeup_preempt_fair()
with idle as the donor.

Suggested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260514234732.3170197-1-jstultz@google.com
This commit is contained in:
John Stultz 2026-05-14 23:47:17 +00:00 committed by Peter Zijlstra
parent 61ea17a637
commit 04f80f8b12
1 changed files with 1 additions and 0 deletions
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kernel/sched/core.c
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@ -6653,6 +6653,7 @@ static inline void proxy_set_task_cpu(struct task_struct *p, int cpu)
static inline struct task_struct *proxy_resched_idle(struct rq *rq)
{
put_prev_set_next_task(rq, rq->donor, rq->idle);
rq->next_class = &idle_sched_class;
rq_set_donor(rq, rq->idle);
set_tsk_need_resched(rq->idle);
return rq->idle;