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Date: Mon, 05 Nov 2007 10:24:14 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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Cc: freebsd-current@freebsd.org, Peter Schuller <peter.schuller@infidyne.com>
Subject: Re: ZFS Hangs
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Thomas Sparrevohn wrote:
> On Sunday 04 November 2007 15:00:50 Kris Kennaway wrote:
> 
>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html
>>
> 
> Oh my god - Overlooked that ;-) - funny that -  Its a bit tricky as it not possibly to dump a kernel
> when the swap is on ZFS - I did a test with all debugging enabled and the problem
> did not show up - which makes it somewhat nasty - I check if I can reproduce it 
> with only DDB enabled 

You can still hook up a serial console, or at the very least take 
photographs of the screen with the relevant DDB information.  Or add 
another disk and dump on that.

Kris