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Date: Thu, 19 Jan 2012 19:35:01 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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Cc: freebsd-stable@FreeBSD.org
Subject: Re: Strange 'hangs' with RELENG_9
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on 19/01/2012 19:14 Alexander Motin said the following:
> On 19.01.2012 18:51, Oliver Pinter wrote:
>> CC: Alexander Motin
>>
>> On 1/19/12, László KÁROLYI<laszlo@karolyi.hu>  wrote:
>>> László KÁROLYI wrote:
>>>> Ok, couldn't get it through... So here is it, uploaded:
>>>>
>>>> http://www.freeimagehosting.net/s836i
>>> Another screenshot here:
>>>
>>> http://www.freeimagehosting.net/xv26d
> 
> I am not sure how freezes that could be fixed with key press could be related to
> panics around storage. I would try to go two different ways:
>  - for panics, if dumping is not possible, I would try to resolve address of the
> "instruction pointer" from both messages with `addr2line -e /path/to/kernel address`.

I would recommend to add the following options to the kernel config:
options         STACK
options         DDB
options         DDB_NUMSYM
options         KDB
options         KDB_TRACE
options         KDB_UNATTENDED
(if you don't have any of them already).

That should add some useful information to the panic messages.
Please try to capture the first panic report before any secondary panics cloud the
situation.

And I agree with Alexander that the panics and the hangs could be unrelated.

-- 
Andriy Gapon