linux-kernel - Re: PATCH: enable PAT at Pentium M 1.7 GHz

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Message-Id: <20080809042401.0A7B4B8AE@nebuchadnezzar.smejdil.cz>
Date:	Sat, 09 Aug 2008 06:24:00 +0200
From:	"CIJOML" <cijoml@...ny.cz>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...hat.com, tglx@...utronix.de
Subject: Re: PATCH: enable PAT at Pentium M 1.7 GHz

H. Peter Anvin writes: 

> CIJOML wrote:
>> Hi there,
>> Sending oneliner enabling PAT at my Pentium M 1.7 GHz CPU. It simply 
>> works.
> 
> That's not really the right way to do that.  Unfortunately the likely 
> failure scenario is "data corruption after a month of uptime."  Thus, we 
> really need someone to review the relevant errata; I believe Venki is 
> planning to do so. 
> 
> 	-hpa

Well the truth is, that I use this little tweak from 2.6.26-rc and first cpu 
having PAT was P3 XEON. And because Intel has backward compatibility, it is 
safe to use it.
I don't have any problem with loosing data or any suspend/resume problems 
with this. 

Reference:
http://safari.ibmpressbooks.com/032124656X/ch32 

Best regards 

Michal
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