Something in r291926 (and earlier) causes reboots during periodic daily (14 jails on system)

[Karl Denninger]

I doubt very much that's involved; I have multiple production systems
with dynamic_write_buffer turned on and I've yet to see a panic from
periodic activity or anything like it.

The only panic I've got open right now that's related to ZFS happens
during a send/receive backup and it's able to be reproduced only with
difficulty (it looks to be a problem in snapshot management as I've
isolated it fairly well but haven't yet found the root cause) -- and it
can be coaxed out of a bare "clean" -STABLE install with no ZFS patches
in at all.  (The codepath that results in the panic doesn't have a
logical connection to that patch, but I tested without it anyway just to
make sure.)

On 12/9/2015 15:15, Dustin Wenz wrote:
> Are you by chance using the ARC patch from this PR?
>
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594
>
> Do you have a vfs.zfs.dynamic_write_buffer tunable defined, if so, what is it set to?
>
> 	- .Dustin
>
>
>> On Dec 9, 2015, at 3:51 AM, Alexander Leidinger <Alexander at Leidinger.net> wrote:
>>
>> On Wed, 09 Dec 2015 09:38:07 +0100
>> Miroslav Lachman <000.fbsd at quip.cz> wrote:
>>
>>> Alexander Leidinger wrote on 12/09/2015 09:00:
>>>> Does this ring a bell for someone or any ideas before I try to hunt
>>>> this down?
>>> The same problem was reported yesterday on Stable
>>>
>>> Periodic jobs triggering panics in 10.1 and 10.2
>>> https://lists.freebsd.org/pipermail/freebsd-stable/2015-December/083807.html
>>>
>>> Also ZFS with jails.
>> The above mail has a backtrace involving ZFS.
>>
>> I'm running the periodic scripts serially now, 8 out of 14 already
>> finished without issues. Smells like a concurrency issue. I would
>> assume it's something introduced between 5 and 1 month ago and MFCed
>> back to 10.
>>
>> Does this ring a bell for someone on fs@?
>>
>> Bye,
>> Alexander.
>>
>> -- 
>> http://www.Leidinger.net Alexander at Leidinger.net: PGP 0xC773696B3BAC17DC
>> http://www.FreeBSD.org    netchild at FreeBSD.org  : PGP 0xC773696B3BAC17DC
>> _______________________________________________
>> freebsd-stable at freebsd.org mailing list
>> https://lists.freebsd.org/mailman/listinfo/freebsd-stable
>> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"

-- 
Karl Denninger
karl at denninger.net <mailto:karl at denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 2996 bytes
Desc: S/MIME Cryptographic Signature
URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20151209/ca6391b5/attachment.bin>