linux-kernel - Re: [PATCH] x86_32: trim memory by updating e820 v3

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Message-Id: <200804280909.06561.jesse.barnes@intel.com>
Date:	Mon, 28 Apr 2008 09:09:06 -0700
From:	Jesse Barnes <jesse.barnes@...el.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Gabriel C <nix.or.die@...glemail.com>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Mika Fischer <mika.fischer@...pnet.de>, balajirrao@...il.com,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86_32: trim memory by updating e820 v3

On Monday, April 28, 2008 6:53 am Ingo Molnar wrote:
> i think we should still try to make this a non-default option because
> modern Xorg should not have any need to touch MTRRs. Perhaps a .config
> dependent on CONFIG_DANGEROUS ;-)

Well, not quite... we're still waiting on some way of getting WC semantics for 
sysfs PCI files.  Suresh tells me something like that is queued up, but until 
that hits the mainline X will still need to bang the MTRRs to get decent 
performance.

Jesse
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