linux-kernel - Re: [patch 4/6] Convert PDA into the percpu section

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Date:	Sat, 31 Mar 2007 04:35:58 +0200
From:	Andi Kleen <ak@...e.de>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	virtualization@...ts.osdl.org, lkml <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [patch 4/6] Convert PDA into the percpu section

On Saturday 31 March 2007 04:00, Jeremy Fitzhardinge wrote:
> Currently x86 (similar to x84-64) has a special per-cpu structure
> called "i386_pda" which can be easily and efficiently referenced via
> the %fs register.  An ELF section is more flexible than a structure,
> allowing any piece of code to use this area.  Indeed, such a section
> already exists: the per-cpu area.

Hmm, I'm a little reluctant. This moves i386 more away from x86-64
again. If we ever merge them it would mean more work. Do you really need it?



-Andi
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