linux-kernel - Re: [PATCH] mmu notifiers #v7

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Date:	Fri, 29 Feb 2008 11:46:44 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Andrea Arcangeli <andrea@...ranet.com>
cc:	Jack Steiner <steiner@....com>, Nick Piggin <npiggin@...e.de>,
	akpm@...ux-foundation.org, Robin Holt <holt@....com>,
	Avi Kivity <avi@...ranet.com>, Izik Eidus <izike@...ranet.com>,
	kvm-devel@...ts.sourceforge.net,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	general@...ts.openfabrics.org,
	Steve Wise <swise@...ngridcomputing.com>,
	Roland Dreier <rdreier@...co.com>,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com
Subject: Re: [PATCH] mmu notifiers #v7

On Fri, 29 Feb 2008, Andrea Arcangeli wrote:

> On Thu, Feb 28, 2008 at 05:03:01PM -0800, Christoph Lameter wrote:
> > I thought you wanted to get rid of the sync via pte lock?
> 
> Sure. _notify is happening inside the pt lock by coincidence, to
> reduce the changes to mm/* as long as the mmu notifiers aren't
> sleep capable.

Ok if this is a coincidence then it would be better to separate the 
notifier callouts from the pte macro calls.
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