linux-kernel - Re: [PATCH -v7 1/3] x86 boot: setup data

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Message-ID: <471E89E1.7060903@zytor.com>
Date:	Tue, 23 Oct 2007 16:55:13 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <ak@...e.de>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	"Huang, Ying" <ying.huang@...el.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -v7 1/3] x86 boot: setup data

Andi Kleen wrote:
> 
> With the early reserve code in 
> ftp://firstfloor.org/pub/ak/x86_64/quilt/patches/early-reserve
> and
> ftp://firstfloor.org/pub/ak/x86_64/quilt/patches/early-alloc
> this could be likely done cleaner.
> 

Indeed it could.  For i386, the equivalent code would have another 
significant benefit: reserving memory and then mapping and accessing it 
later would (at least eventually) allow accesses > 4 GB on PAE kernels 
(or with a PSE36 hack, on non-PAE kernels.)

	-hpa
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