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Date: Wed, 25 Apr 2007 11:03:41 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
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To: Jens Axboe <jens.axboe@oracle.com>
cc: linux-kernel@vger.kernel.org, Mel Gorman <mel@skynet.ie>,
       William Lee Irwin III <wli@holomorphy.com>, David Chinner <dgc@sgi.com>,
       Badari Pulavarty <pbadari@gmail.com>,
       Maxim Levitsky <maximlevitsky@gmail.com>
Subject: Re: [00/17] Large Blocksize Support V3
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On Wed, 25 Apr 2007, Jens Axboe wrote:

> > Impossible. page is not dereferenced. Cannot cause a NULL pointer 
> > deference.
> 
> Sure I know that, hence the oops happening there is likely fallout from
> something scribbling where it should not have.

Hmmm... Must be a big scribble. And you are sure that no bouncing or 
highmem stuff is done? Any way to figure out what that is?