Clear ke_runq before calling maybe_preempt, this avoids a
KASSERT(ke->ke_runq == NULL) panic when the sched_add is recursively called by maybe_preempt. Reported by: Wojciech A. Koszek < dunstan at freebsd dot czest dot pl >
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=159599
@ -2150,8 +2150,10 @@ sched_add(struct thread *td, int flags)
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if (ke->ke_runq == my_ksq->ksq_curr &&
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td->td_priority < curthread->td_priority) {
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curthread->td_flags |= TDF_NEEDRESCHED;
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ke->ke_runq = NULL;
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if (preemptive && maybe_preempt(td))
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return;
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ke->ke_runq = my_ksq->ksq_curr;
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if (curthread->td_ksegrp->kg_pri_class == PRI_IDLE)
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td->td_owepreempt = 1;
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}
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