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Assert that smp_rendezvous_cpus is called with interrupts enabled.

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mjg 2020-01-30 19:38:51 +00:00
parent 23e6779681
commit a2af893072
1 changed files with 6 additions and 0 deletions
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6
sys/kern/subr_smp.c
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@ -563,6 +563,12 @@ smp_rendezvous_cpus(cpuset_t map,
return;
}
/*
* Make sure we come here with interrupts enabled. Otherwise we
* livelock if smp_ipi_mtx is owned by a thread which sent as an IPI.
*/
MPASS(curthread->td_md.md_spinlock_count == 0);
CPU_FOREACH(i) {
if (CPU_ISSET(i, &map))
ncpus++;