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Message-Id: <200710240118.21160.ak@suse.de>
Date:	Wed, 24 Oct 2007 01:18:20 +0200
From:	Andi Kleen <ak@...e.de>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"Huang, Ying" <ying.huang@...el.com>,
	"H. Peter Anvin" <hpa@...or.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

On Wednesday 24 October 2007 00:08:32 Jeremy Fitzhardinge wrote:
> Huang, Ying wrote:
> > This patch add a field of 64-bit physical pointer to NULL terminated
> > single linked list of struct setup_data to real-mode kernel
> > header. This is used as a more extensible boot parameters passing
> > mechanism.
> >   
> 
> As a general comment, I can't say I'm thrilled about sticking the copied
> setup data at the end of the initial pagetables.  This is already a
> fairly complex area, and changing it touches a surprisingly large number
> of places.  I wonder if there isn't a better way to deal with this
> (possibly by fixing up the generation of the initial pagetables in the
> process).

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.

-Andi
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