linux-kernel - Re: divorce CONFIG_X86_PAE from CONFIG

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Message-ID: <20070612000026.GC6909@holomorphy.com>
Date:	Mon, 11 Jun 2007 17:00:26 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	linux-kernel@...r.kernel.org, Mark Lord <lkml@....ca>,
	Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: divorce CONFIG_X86_PAE from CONFIG_HIGHMEM64G

On Thu, Jun 07, 2007 at 07:35:51PM -0700, William Lee Irwin III wrote:
>> +	  PAE is required for NX support, and furthermore enables
>> +	  larger swapspace support for non-overcommit purposes. It
>> +	  has the cost of more pagetable lookup overhead, and also
>> +	  consumes more pagetable space per process.

On Tue, Jun 12, 2007 at 01:52:35AM +0200, Adrian Bunk wrote:
> It's not specific to this help text, but I start becoming a bit picky 
> about this issues:
> If you understand this help text after reading it, you don't need a help 
> text for this option...  ;-)
> What is "NX support"?
> What are "non-overcommit purposes"?
> What is "pagetable lookup overhead"?
> And if in doubt, should I say Y or N?
> "System administrator who knows which hardware components he put into 
> the computer and which filesystems his data is on" might be a good 
> description for the average kconfig user, and these are the people who 
> should understand this help text.

I would like to have some place to explain issues such as those, but
there are as of yet no designated places for tutorial-level information.

If such a place were provided, I would provide storybook commentary to
explain all those. Similarly actually holds for kernel function docbook.


-- wli
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