ZFS DEADLKRES

[Attilio Rao]

2010/2/22 Marcin Cieslak <saper at saper.info>:
>
>
>
> On Sat, 20 Feb 2010, Attilio Rao wrote:
>
>> 2010/2/18 Marcin Cieslak <saper at saper.info>:
>>>
>>> My r203753 amd64 laptop falls into the deadlock situation
>>> every night while running periodic daily script. I am pretty
>>> certain this is related to ZFS.
>>>
>>> I have enabled DEADLKRES in the kernel. I even have
>>> a separate dump partition (not used for swap).
>>
>> May you reproduce the bug with WITNESS?
>> If you can, you should enable DEADLKRES too and once it panics let
>> extract a textdump(4) with the following commands:
>> bt, ps, show alllocks, show pcpu, allthreads
>
> Unfortunately, there is no way to write anything to disk.
> All attempts to talk to the ata subsystem from ddb(4)
> fail with EIO (probably timeout).

This may be a false positive.
May you please try the following patch and report if you can fix it
does fix it or not?:
http://www.freebsd.org/~attilio/Sandvine/deadlkres/deadlkres-blessed.diff

Thanks,
Attilio


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