Re: [PATCH 1/5] x86, mm, pat: Set WT to PA4 slot of PAT MSR

[H. Peter Anvin]

On 09/05/2014 07:00 AM, Toshi Kani wrote:
> 
> That's a fine idea, but as Ingo also suggested, I am going to disable
> this feature on all Pentium 4 models.  That should give us a safety
> margin.  Using slot 4 has a benefit that it keeps the PAT setup
> consistent with Xen.      
> 

Slot 4 is also the maximally problematic one, because it is the one that
might be incorrectly invoked for the page tables themselves.

	-hpa


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