[Bug 250667] Frequent Kernel panic for spin lock on TrueNAS (FreeBSD 12.2)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250667

Mark Johnston <markj at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |markj at FreeBSD.org
             Status|New                         |Open

--- Comment #1 from Mark Johnston <markj at FreeBSD.org> ---
We're panicking because an idle thread is processing callouts and apparently
taking too long.  Unfortunately I can't see what it was actually doing.  There
aren't many users of C_DIRECT_EXEC but it's possible the thread is somehow
stuck in a callout handler.  It's possible that some memory corruption is
causing callout_process() to loop infinitely on a callout list.

I don't think it'll be easy to debug this without a vmcore:
https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html#kerneldebug-obtain

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