linux-kernel - Re: [PATCH] x86: set Pentium M as PAE capable

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Message-ID: <20140302210201.GA31948@redhat.com>
Date:	Sun, 2 Mar 2014 16:02:01 -0500
From:	Dave Jones <davej@...hat.com>
To:	Andreas Mohr <andi@...as.de>
Cc:	Chris Bainbridge <chris.bainbridge@...il.com>,
	Dennis Mungai <dmngaie@...il.com>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: set Pentium M as PAE capable

On Sun, Mar 02, 2014 at 09:56:19PM +0100, Andreas Mohr wrote:

 > (BTW, would it be possible to transform Linux's PAE support into
 > boot-config or even fully runtime-detectable boot switching to
 > (non-)PAE, similar to or exceeding what XP offers with its static
 > boot-time flag?
 > Last time I checked PAE support config defines were spread over ~ 40
 > kernel source files though :-((()

It would be a considerable amount of work to make it a runtime thing.
Ten years ago, maybe it would be worth the effort perhaps, but I'd
suggest just letting 32-bit slowly die instead of doing dramatic overhauls
that will no doubt introduce a bunch of regressions in code that's been
notoriously awful to debug issues in during the past.

	Dave

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