linux-kernel - Re: data corruption with nvidia chipsets and IDE/SATA drives (k8 cpu errata needed?)

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Message-Id: <200703121406.33334.ak@suse.de>
Date:	Mon, 12 Mar 2007 14:06:33 +0100
From:	Andi Kleen <ak@...e.de>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	linux-kernel@...r.kernel.org, Chip Coldwell <coldwell@...hat.com>
Subject: Re: data corruption with nvidia chipsets and IDE/SATA drives (k8 cpu errata needed?)

> Andi, have you had a look at this? I'm a bit surprised at the lack of 
> reaction to this find..

FYI the problem is still being analysed behind the scenes. Chip's patch didn't fix 
it in all cases unfortunately -- it just changed the timing enough to make it happen
less often. The latest evidence points to a DMA mapping management problem
in Linux. Apparently in some cases sata_nv does DMA on an already freed and then
reused mapping.

-Andi
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