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sched/fair: Never pick the misfit task as its own rotation partner #927

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Merged
RyanTheTide merged 1 commit into from
Nov 5, 2026
Merged

sched/fair: Never pick the misfit task as its own rotation partner #927

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6 changes: 5 additions & 1 deletion kernel/sched/fair.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15104,7 +15104,11 @@ static void misfit_rotate_work(struct work_struct *work)
continue;

c = rcu_dereference_all(rq->curr);
if (!misfit_rotate_candidate(c) ||
/*
* Balancing may have pulled p here since the check above;
* migrate_swap(p, p) takes p->pi_lock twice in the stopper.
*/
if (c == p || !misfit_rotate_candidate(c) ||
!cpumask_test_cpu(src_cpu, c->cpus_ptr))
continue;

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