linux-kernel - Re: divorce CONFIG_X86_PAE from CONFIG

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Message-Id: <20070607194156.d4aacf4c.akpm@linux-foundation.org>
Date:	Thu, 7 Jun 2007 19:41:56 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	William Lee Irwin III <wli@...omorphy.com>
Cc:	linux-kernel@...r.kernel.org, Mark Lord <lkml@....ca>,
	Andi Kleen <ak@...e.de>
Subject: Re: divorce CONFIG_X86_PAE from CONFIG_HIGHMEM64G

On Thu, 7 Jun 2007 19:35:51 -0700 William Lee Irwin III <wli@...omorphy.com> wrote:

> PAE is useful for more than supporting more than 4GB RAM. It supports
> expanded swapspace and NX executable protections. Some users may want
> NX or expanded swapspace support without the overhead or instability
> of highmem. For these reasons, the following patch divorces
> CONFIG_X86_PAE from CONFIG_HIGHMEM64G.

Do (CONFIG_X86_PAE && !CONFIG_HIGHMEM64G) and (!CONFIG_X86_PAE && CONFIG_HIGHMEM64G)
kernels actually work?  I wouldn't be surprised if there are places where we used
the incorrect one.
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