linux-kernel - Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges

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Message-ID: <20080130005912.GC7233@v2.random>
Date:	Wed, 30 Jan 2008 01:59:12 +0100
From:	Andrea Arcangeli <andrea@...ranet.com>
To:	Christoph Lameter <clameter@....com>
Cc:	Robin Holt <holt@....com>, Avi Kivity <avi@...ranet.com>,
	Izik Eidus <izike@...ranet.com>, Nick Piggin <npiggin@...e.de>,
	kvm-devel@...ts.sourceforge.net,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, steiner@....com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com, Hugh Dickins <hugh@...itas.com>
Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address
	ranges

On Tue, Jan 29, 2008 at 04:22:46PM -0800, Christoph Lameter wrote:
> That is only partially true. pte are created wronly in order to track 
> dirty state these days. The first write will lead to a fault that switches 
> the pte to writable. When the page undergoes writeback the page again 
> becomes write protected. Thus our need to effectively deal with 
> page_mkclean.

Well I was talking about anonymous memory.
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