Re: [PATCH v2 2/6] x86, mm, pat: Change reserve_memtype() to handle WT

[Toshi Kani]

On Wed, 2014-09-10 at 15:00 -0700, H. Peter Anvin wrote:
> On 09/10/2014 02:47 PM, Toshi Kani wrote:
> >>
> >> Yes.  Don't think of it as PAT vs non-PAT.  Think of it as a specific
> >> set of cache types available on different processors.  The fact that you
> >> may have to frob an MSR to initialize it is almost trivial in comparison.
> > 
> > Right.
> > 
> 
> In that sense the Xen "fixed PAT" fits right in.

Got it. Nicely simplified. :) 

Thanks,
-Toshi


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