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Date: Tue, 20 Feb 2007 19:35:14 +0300
From: Alex Povolotsky <tarkhil@webmail.sub.ru>
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To: "Andrey V. Elsukov" <bu7cher@yandex.ru>
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Cc: freebsd-net@freebsd.org, FreeBSD Stable <freebsd-stable@freebsd.org>
Subject: Re: mpd sometimes hangs the whole system?
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Andrey V. Elsukov wrote:
> Alex Povolotsky пишет:
>> mpd (fresh) on FreeBSD 6.1p12 sometimes hangs system, totally, to 
>> reset. Tried two completely different boxes, so it cannot be a 
>> hardware problem.
>
> It's easy to reproduce? Can you try make debug-friendly kernel?
RELATIVELY easy. It happens about once a day or more often; but it 
requires someone to press Reset.
>
> http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-deadlocks.html 
>
> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html 
>
> http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-online-ddb.html 
>

Thanks a lot, I've added invariants and witness; if it won't yield any 
information, I'll try more.

So far, this cursed thing is working with some load for 2 hours, that's 
much. It does NOT, surely NOT try to tunnel tunnelled traffic; any 
serialconsole setup is useless since it is also a main gateway. If it 
dies, nothing but physical access can help.

Alex.