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From: Borja Marcos <borjam@sarenet.es>
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To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
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Subject: Re: Many processes stuck in zfs
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On Mar 13, 2010, at 4:24 PM, Pawel Jakub Dawidek wrote:

> On Fri, Mar 12, 2010 at 11:12:49AM +0100, Borja Marcos wrote:
>>=20
>> On Mar 10, 2010, at 6:31 PM, Pawel Jakub Dawidek wrote:
>>=20
>>> Hmm, interesting. Especially those two traces:
>>>=20
>>> Tracing command zfs pid 1820 tid 100105 td 0xffffff0002ca4000
>>=20
>> Just in case something was wrong, I wiped the two virtual machines =
and started everything again. The two virtual systems were acting a bit =
weird, giving lots of LORs. I don't know why, maybe something was =
corrupted, these virtual machines have been panicked and restarted many =
times.
>>=20
>> So, experiment repeated again, fresh start. Still deadlocking pretty =
soon if I start, say, 5 or 6 tar processes. Traces follow.
>=20
> Are you able to dump the kernel memory and make it available for me
> somewhere? I'd need to look at it wit GDB, as DDB is not enough here,
> I'm afraid.

Sure. Do you have access to VMWare Fusion? I can create a snapshot of =
the deadlocked system and make it available to you.





Borja.