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Date:      Sun, 22 Feb 2015 10:54:54 -0800
From:      Sean Bruno <sbruno@ignoranthack.me>
To:        Konstantin Belousov <kostikbel@gmail.com>
Cc:        FreeBSD current <freebsd-current@freebsd.org>
Subject:   Re: panic on application core dump?
Message-ID:  <54EA25FE.60401@ignoranthack.me>
In-Reply-To: <20150222185352.GL74514@kib.kiev.ua>
References:  <54E8EA2A.7020904@ignoranthack.me> <20150221211712.GG74514@kib.kiev.ua> <54EA1325.6070009@ignoranthack.me> <20150222180425.GJ74514@kib.kiev.ua> <54EA241D.6020606@ignoranthack.me> <20150222185352.GL74514@kib.kiev.ua>

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On 02/22/15 10:53, Konstantin Belousov wrote:
> On Sun, Feb 22, 2015 at 10:46:53AM -0800, Sean Bruno wrote:
>> Hmm ... looks unrelated to signals (maybe).  This looks like a
>> common ZFS deadlock that is yet undiagnosed.  I do not have a
>> show alllocks command available in db> .  I will show each lock
>> information below:
> Add witness.
> 
>> 
>> db> show lockedvnods Locked vnodes
>> 
>> 0xfffff801141a6588: tag zfs, type VDIR usecount 19, writecount 0,
>> refcount 20 mountedhere 0 flags (VV_ROOT|VI_ACTIVE) v_object
>> 0xfffff80079be4500 ref 0 pages 0 cleanbuf 0 dirtybuf 0 lock type
>> zfs: EXCL by thread 0xfffff801ca10c4a0 (pid 75907, sh, tid
>> 101262) with exclusive waiters pending
> Without backtraces of the acquisition, it is not useful.  You need 
> DEBUG_VFS_LOCKS for this.
> 
> 

Thank you.  I will do so and restart my non-determinstic test and see
what I can find.

sean
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