Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'sched-urgent-2026-03-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"Fix a DL scheduler bug that may corrupt internal metrics during PI and
setscheduler() syscalls, resulting in kernel warnings and misbehavior.
Found during stress-testing"
* tag 'sched-urgent-2026-03-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/deadline: Fix missing ENQUEUE_REPLENISH during PI de-boosting
+30
+30
kernel/sched/syscalls.c
+30
kernel/sched/syscalls.c
···
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uid_eq(cred->euid, pcred->uid));
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}
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#ifdef CONFIG_RT_MUTEXES
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static inline void __setscheduler_dl_pi(int newprio, int policy,
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struct task_struct *p,
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struct sched_change_ctx *scope)
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{
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/*
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* In case a DEADLINE task (either proper or boosted) gets
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* setscheduled to a lower priority class, check if it neeeds to
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* inherit parameters from a potential pi_task. In that case make
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* sure replenishment happens with the next enqueue.
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*/
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if (dl_prio(newprio) && !dl_policy(policy)) {
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struct task_struct *pi_task = rt_mutex_get_top_task(p);
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if (pi_task) {
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p->dl.pi_se = pi_task->dl.pi_se;
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scope->flags |= ENQUEUE_REPLENISH;
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}
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}
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}
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#else /* !CONFIG_RT_MUTEXES */
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static inline void __setscheduler_dl_pi(int newprio, int policy,
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struct task_struct *p,
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struct sched_change_ctx *scope)
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{
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}
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#endif /* !CONFIG_RT_MUTEXES */
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+
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#ifdef CONFIG_UCLAMP_TASK
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static int uclamp_validate(struct task_struct *p,
···
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__setscheduler_params(p, attr);
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p->sched_class = next_class;
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p->prio = newprio;
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__setscheduler_dl_pi(newprio, policy, p, scope);
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}
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__setscheduler_uclamp(p, attr);
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