linux-kernel - Re: [PATCH 06/16] xen: disable PAT

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Message-ID: <4A261957.3040103@goop.org>
Date:	Wed, 03 Jun 2009 16:33:59 +1000
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Ingo Molnar <mingo@...e.hu>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Ian Campbell <ian.campbell@...rix.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: Re: [PATCH 06/16] xen: disable PAT

Thomas Gleixner wrote:
> On Tue, 12 May 2009, Jeremy Fitzhardinge wrote:
>
>   
>> From: Ian Campbell <ian.campbell@...rix.com>
>>
>> Xen imposes a particular PAT layout on all paravirtual guests which
>> does not match the layout Linux would like to use.
>>
>> Force PAT to be disabled until this is resolved.
>>     
>
> No, this can be done via CPUID, which is paravirtualized already.
>   

Stomp the PAT feature flag?  Yes, that's a better idea.

Thanks,
    J
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