[Bug 261198] bhyve host panics with: spin lock 0xffffffff81eac800 (callout) helpanic: spin lock held too long

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 14 Jan 2022 14:08:31 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261198

            Bug ID: 261198
           Summary: bhyve host panics with: spin lock 0xffffffff81eac800
                    (callout) helpanic: spin lock held too long
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: thj@FreeBSD.org

Created attachment 231002
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=231002&action=edit
Panic while rebooting guest

My FreeBSD bhyve host running 1 FreeBSD guest (both 14.0-CURRENT) is
sporadically panicing with spinlock held too long. I have attached photos of
the two panic messages I have seen.

The first panic happened when the guest was rebooting, the second when I was
running a disk perf measurement in the vm. 

I will set up better remote access when I am a the machine tomorrow so I can
interact with it once it has paniced. 

host: FreeBSD pokeitwithastick 14.0-CURRENT FreeBSD 14.0-CURRENT #8
main-n252356-01cad731921: Tue Jan 11 10:13:27 UTC 2022    
tj@pokeitwithastick:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64

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