linux-kernel - Re: PAT and MTRRs

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Message-ID: <49050995.4080508@zytor.com>
Date:	Sun, 26 Oct 2008 17:21:41 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	"Diego M. Vadell" <dvadell@...uxclusters.com.ar>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: PAT and MTRRs

Arjan van de Ven wrote:
> 
> PAT can't make memory cachable that the MTRR's have as uncachable.
> What PAT *can* do is, within an MTRR, do fine grained mapping...
> 

Now, if it wasn't for the braindamage called ACPI and SMM, we could have 
   cleared the MTRR settings and just used PAT...

	-hpa
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