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Date: Sun, 20 Jul 2014 20:29:31 -0500 (CDT)
From: Dan Mack <mack@macktronics.com>
To: Steven Hartland <killing@multiplay.co.uk>
Subject: Re: [ZFS][PANIC] Solaris Assert/zio.c:2548
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Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org,
 Larry Rosenman <ler@lerctr.org>
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On Mon, 21 Jul 2014, Steven Hartland wrote:

>> I just updated to I think 268921 earlier today and this is the first
>> time I've had a panic (HEAD-268921 that is)
>> 
>> I'll try to get some more data if I can get it back up and running.
>
> That doesn't look like a related trace tbh.
>
>   Regards
>   Steve

After rebooting with a dumpdev; I got this :

kbd2 at ukbd0
Trying to mount root from zfs:tank []...
panic: deadlkres: possible deadlock detected for 0xfffff8000e089000, blocked for 1801216 ticks

cpuid = 6
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe085ef1d8d0
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe085ef1d980
vpanic() at vpanic+0x126/frame 0xfffffe085ef1d9c0
panic() at panic+0x43/frame 0xfffffe085ef1da20
deadlkres() at deadlkres+0x35c/frame 0xfffffe085ef1da70
fork_exit() at fork_exit+0x84/frame 0xfffffe085ef1dab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe085ef1dab0
--- trap 0, rip = 0, rsp = 0xfffffe085ef1db70, rbp = 0 ---
KDB: enter: panic
[ thread pid 0 tid 100070 ]
Stopped at      kdb_enter+0x3e: movq    $0,kdb_why

I cannot seem to get past this yet so I'm open to suggestions.  I'm
still at the db> prompt if you'd like me to attempt to collect more
info.

dan
--
Dan Mack