Re: [RFC PATCH 0/11] Support Write-Through mapping on x86

From: H. Peter Anvin
Date: Tue Jul 15 2014 - 16:10:54 EST

On 07/15/2014 12:53 PM, Andy Lutomirski wrote:
> Note that MTRRs are already partially deprecated: all drivers *should*
> be using arch_phys_wc_add, not mtrr_add, and arch_phys_wc_add is a
> no-op on systems with working PAT.
> Unfortunately, I never finished excising mtrr_add. Finishing the job
> wouldn't be very hard.

The use of MTRRs in drivers is separate from the MTRR global setup done
by the firmware, though.


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