linux-kernel - Re: quicklists confuse meminfo

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Message-ID: <47D5A000.6000407@zytor.com>
Date:	Mon, 10 Mar 2008 21:54:24 +0100
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Andi Kleen <andi@...stfloor.org>, Hugh Dickins <hugh@...itas.com>,
	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Bart Van Assche <bart.vanassche@...il.com>
Subject: Re: quicklists confuse meminfo

Jeremy Fitzhardinge wrote:
> 
> Yeah, the most fundamental problem is that the whole page is RO, so even 
> if Xen trapped and emulated, it still makes a very bad neighbour.  I was 
> also going to say that there's no reason why you couldn't pack multiple 
> pgds into one page, but I think we can only specify the cr3 at page 
> resolution anyway.
> 

Wrong.  With PAE you can specify it at any 32-byte boundary.

	-hpa

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