From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [patch 20/20] Add apply_to_page_range() which applies a function
 to a pte range.
Date: Thu, 19 Apr 2007 14:37:53 -0700
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To: Matt Mackall <mpm@selenic.com>
Cc: Matt Mackall <mpm@waste.org>, Ian Pratt <ian.pratt@xensource.com>, lkml <linux-kernel@vger.kernel.org>, Chris Wright <chrisw@sous-sol.org>, virtualization@lists.osdl.org, Andrew Morton <akpm@linux-foundation.org>, Christoph Lameter <clameter@sgi.com>, Ingo Molnar <mingo@elte.hu>
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Matt Mackall wrote:
> Haven't thought a huge amount about that. Perhaps it's best done with
> the level 3 callback?
>   

Level 2, I think, assuming you count the pte pages as level 1.  I think
it can be dealt with, so long as it correctly skips level 1 callbacks
for superpages, and does the test after the level 2 callback has returned.

    J