linux-kernel - Re: [PATCH] x86-64: adjust pmd

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Message-ID: <Pine.LNX.4.64.0611151658520.24160@blonde.wat.veritas.com>
Date:	Wed, 15 Nov 2006 17:01:54 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Jan Beulich <jbeulich@...ell.com>
cc:	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org,
	patches@...-64.org
Subject: Re: [PATCH] x86-64: adjust pmd_bad()

On Wed, 15 Nov 2006, Jan Beulich wrote:

> Make pmd_bad() symmetrical to pgd_bad() and pud_bad(). At once,
> simplify them all.

Symmetrical and simpler, yes, but you're weakening the pmd_bad() test:
no longer requires that all those _KERNPG_TABLE bits be set.  Wouldn't
it be better to go the other way and strengthen pgd_bad, pud_bad?

Hugh
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