MTRR setting failure

[Adam Jackson]

On Monday 21 March 2005 06:27, Peter Karlsson wrote:
> On Mon, 21 Mar 2005, Mike A. Harris wrote:
> > What is really needed, is for the Linux kernel (and other OS kernels) to
> > aquire PAT support, as the hardware feature has existed since the Pentium
> > Pro and later, and all Athlon CPUs.  Not sure about AMD K6/K5 or other
> > brands/models.  The X server should then try to use the interfaces the
> > kernel would provide to set cacheability on page level granularity, and
> > only try to use MTRRs if the system does not support PAT.
>
> Do you mean intel's 'Performance Acceleration Technology' (a.k.a. PAT)?

No, Page Attribute Table:

http://www.kerneltraffic.org/kernel-traffic/kt20030616_219.html#3

Think MTRRs but with per-page granularity, rather than having a max of six-ish 
ranges for the whole system.

- ajax
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