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Date: Fri, 17 Nov 2006 09:29:28 -0500
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>,
       Jesper Juhl <jesper.juhl@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: How to go about debuging a system lockup?
Message-ID: <20061117142928.GT8236@csclub.uwaterloo.ca>
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From: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
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On Fri, Nov 17, 2006 at 02:43:36PM +0100, Stefan Richter wrote:
> If the PCI bus itself isn't brought down, you could debug from remote
> using Benjamin Herrenschmidt's Firescope on the remote node and a
> FireWire card in the test machine. Once the ohci1394 driver was loaded,
> the FireWire controller is able to read and write to the 32bit PCI
> address range (and thus to system memory) without assistance of
> interrupt handlers.

Wow, that looks really neat.  I will have to go read up on that tool.

--
Len Sorensen
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