MTRR setting failure

[Peter Karlsson]

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)?

http://www.intel.com/design/chipsets/pat.htm

According to the web page above it's only implemented in intel's 875P 
chipset (supposedly it is implemented in the newer chips too?)...

Best regards

Peter K