[Bug 271983] mi_switch hang in KVM on Sapphire Rapids running NET_EPOCH_DRAIN_CALLBACKS
Date: Tue, 13 Jun 2023 16:54:20 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271983
Mark Johnston <markj@FreeBSD.org> changed:
What |Removed |Added
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Status|New |Open
CC| |markj@FreeBSD.org
--- Comment #1 from Mark Johnston <markj@FreeBSD.org> ---
sched_bind() moves the calling thread to a different CPU, so here it's switched
off the old CPU and waiting for a chance to run on the new one. If that's not
happening quickly, it's probably because some other, higher-priority thread is
monopolizing the target CPU. top -H ought to be able to confirm whether that's
the case.
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