linux-kernel - Re: [PATCH] x86: trim ram need to check if mtrr is there v2

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Message-ID: <47997735.1020501@zytor.com>
Date:	Thu, 24 Jan 2008 21:44:21 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <Yinghai.Lu@....COM>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: trim ram need to check if mtrr is there v2

Yinghai Lu wrote:
>> H. Peter Anvin wrote:
>> Looks like the code doesn't check that the CPU *has* MTRRs...
> 
> so check it mtrr is there, also check if mem less 4G and is AMD as early

Why the check for < 4 GB?  The same thing applies to memory below the 4 
GB limit -- in fact, we've had a number of that kind of systems in the past.

	-hpa
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