linux-kernel - Re: [PATCH] i386/PAE: avoid temporarily inconsistent pte-s

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Message-Id: <200709191809.47351.ak@suse.de>
Date:	Wed, 19 Sep 2007 18:09:47 +0200
From:	Andi Kleen <ak@...e.de>
To:	"Jan Beulich" <jbeulich@...ell.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i386/PAE: avoid temporarily inconsistent pte-s

On Wednesday 19 September 2007 16:39:39 Jan Beulich wrote:
> One more of these issues (which were considered fixed a few releases
> back): Other than on x86-64, i386 allows set_fixmap() to replace
> already present mappings. Consequently, on PAE, care must be taken to
> not update the high half of a pte while the low half is still holding
> the old value.

Hmm perhaps it would be better to just forbid it on i386 too.
Do you know who uses it?

-Andi

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