[Bug 271983] mi_switch hang in KVM on Sapphire Rapids running NET_EPOCH_DRAIN_CALLBACKS

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 271983] mi_switch hang in KVM on Sapphire Rapids running NET_EPOCH_DRAIN_CALLBACKS"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 13 Jun 2023 19:39:12 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271983

--- Comment #6 from Mark Johnston <markj@FreeBSD.org> ---
Comment on attachment 242766
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=242766
procstat -kka

oh, you also need to pass -S to top.  I see one thread which looks to be
spinning:

7 100267 rand_harvestq       -                   vtrnd_read+0xa4
random_kthread+0x174 fork_exit+0x80 fork_trampoline+0xe

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