linux-kernel - Re: [PATCH]Fix broken VMI in 2.6.27-rc..

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Date:	Thu, 07 Aug 2008 17:29:00 -0700
From:	"H. Peter Anvin" <hpa@...nel.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Zachary Amsden <zach@...are.com>,
	Alok Kataria <akataria@...are.com>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	the arch/x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH]Fix broken VMI in 2.6.27-rc..

Jeremy Fitzhardinge wrote:
> 
>> Yes, and we should add a symbol for the bottom of the 1:1 area as well 
>> (to disambiguate it from TASK_SIZE).
> 
> Well, that's already called "PAGE_OFFSET".  64-bit needs to be careful 
> about the distinction anyway, because there's the sign extension hole 
> between user and kernel space.  Xen squeezes itself in just above the 
> hole, so I moved PAGE_OFFSET up accordingly.

Ah, that explains that strange offset.  I was wondering about that.

	-hpa

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