linux-kernel - Re: [PATCH] [30/30] x86_64: Add missing !X86

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Date:	Tue, 01 May 2007 10:20:04 -0400
From:	Mark Lord <lkml@....ca>
To:	William Lee Irwin III <wli@...omorphy.com>
Cc:	Andi Kleen <ak@...e.de>, ebiederm@...ssion.com, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [30/30] x86_64: Add missing !X86_PAE dependincy to the
 2G/2G split.

William Lee Irwin III wrote:
>..
> On Tue, May 01, 2007 at 09:32:33AM -0400, Mark Lord wrote:
>> You need to go search the archives and read the *extensive* thread
>> on this from when it was introduced.  Lots of high profile kernel
>> developers were in on this one.
> 
> Various good points were raised. The NX bit requiring
> 3-level pagetables suggests that 3-level pagetables without highmem
> would be valuable, at which point the unaligned splits to avoid highmem
> with 3-level pagetables gain additional relevance. I'll queue that up
> to be written along with split pmd affairs, and check for features
> dependent on 4-level pagetables, too.

Excellent!  That would be super to have in there, William.

Cheers!
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