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Date: Sat, 12 Jan 2002 21:05:38 +0100
From: Jens Axboe <axboe@suse.de>
To: Andre Hedrick <andre@linuxdiskcert.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: BIO Usage Error or Conflicting Designs
Message-ID: <20020112210538.F19814@suse.de>
In-Reply-To: <200201121828.g0CISaM342258@saturn.cs.uml.edu> <Pine.LNX.4.10.10201121040040.13034-200000@master.linux-ide.org>
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On Sat, Jan 12 2002, Andre Hedrick wrote:
> 
> Jens,
> 
> Below is a single sector read using ACB.
> If I do not use the code inside "#ifdef USEBIO" and run UP/SMP but no
> highmem, it runs and works like a charm.  It is also 100% unchanged code
> from what is in 2.4 patches.  The attached oops is generate under
> SMP without highmem and running the USEBIO code.
> 
> CONFIG_NOHIGHMEM=y

Is this with the highmem debug stuff enabled? That's the only way I can
see this BUG triggering, otherwise q->bounce_pfn _cannot_ be smaller
than the max_pfn.

-- 
Jens Axboe

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