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Date:      Sat, 09 Jan 2016 18:09:15 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-fs@FreeBSD.org
Subject:   [Bug 204764] Filesystem deadlock, process in vodead state
Message-ID:  <bug-204764-3630-gbFn7NGKEg@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-204764-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-204764-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D204764

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib@FreeBSD.org

--- Comment #2 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to daniel from comment #1)
Recompile the kernel with INVARIANTS etc, see the guide at
https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerne=
ldebug-deadlocks.html

When the situation occurs, execute 'kgdb <path>/kernel.debug /dev/mem'.  Af=
ter
that, switch to the thread which hung, with the kgdb command 'thread <id>'.=
=20
Backtrace 'bt' would should you the arguments, find the vnode address which
caused the hang (most likely it is shown as vp), and do 'p *vp', 'p
*(vp->v_bufobj.bo_object)'.

--=20
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