linux-kernel - Re: PAT support (or lack of) for Pentium 3 CPU's

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Date:	Tue, 16 Jun 2009 17:38:17 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	<braddo@...nceaddict.net>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: PAT support (or lack of) for Pentium 3 CPU's

On Tue, 16 Jun 2009 08:09:04 -0700
"Brad Allen" <braddo@...nceaddict.net> wrote:

> It has come to my attention that PAT support has been disabled for P3 CPU's in kernel versions 2.6.30 and later due to a bug in the CPU. 
> 
> I have attempted to get the NVIDIA proprietary drivers working with these kernel versions and 3 different Pentium 3 motherboards, all have failed. The drivers seem to require PAT support in order to work correctly, each board has in fact produced a different error when using only MTRR.
> 
> Can a kernel option be added to enable/disable PAT for P3 CPU's? Or is there any possible workaround for the bug?

Please ask Nvidia for support on their proprietary products. Only they
have all the code.
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