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Date:      Fri, 19 Aug 2005 08:44:29 -0600
From:      "Justin T. Gibbs" <gibbs@scsiguy.com>
To:        Marian Hettwer <MH@kernel32.de>, "Justin T. Gibbs" <gibbs@scsiguy.com>
Cc:        freebsd-current@freebsd.org
Subject:   Re: Adaptec AIC-7901 (ahd) broken with 6.0-BETA2
Message-ID:  <3F5D63052EDC670D1C98312F@[10.0.0.90]>
In-Reply-To: <4305E4A3.6040902@kernel32.de>
References:  <4305967B.8010909@kernel32.de> <435838B88932CE9C36A18199@aslan.scsiguy.com> <4305E4A3.6040902@kernel32.de>

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>> It looks like the system was able to talk to the controller and your
>> drive just fine, but hung later.  Can you break into the debugger
>> and get a stack trace of where the system is hung?
>>
> Pardon me, but how do I break into the debugger ? :)
> I know, if I'm using -CURRENT I should know how to do it... could you
> point me at the right direction anyway ? :-)

http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-online-ddb.html

> Even if I could break into debugger, I would need to get a serial console
> working, otherwise a stack trace could be quite hard to get. I don't
> think I want to type this by hand...

The top few functions are likely all that are important.  <Scroll-Lock> 
followed by
PgUp is your friend.

--
Justin





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