linux-kernel - Re: [PATCH 00 of 12] mmu notifier #v13

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Message-ID: <Pine.LNX.4.64.0804221328400.3640@schroedinger.engr.sgi.com>
Date:	Tue, 22 Apr 2008 13:30:53 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Robin Holt <holt@....com>
cc:	Andrea Arcangeli <andrea@...ranet.com>,
	Nick Piggin <npiggin@...e.de>, Jack Steiner <steiner@....com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	kvm-devel@...ts.sourceforge.net,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	Roland Dreier <rdreier@...co.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	linux-kernel@...r.kernel.org, Avi Kivity <avi@...ranet.com>,
	linux-mm@...ck.org, general@...ts.openfabrics.org,
	Hugh Dickins <hugh@...itas.com>, akpm@...ux-foundation.org,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 00 of 12] mmu notifier #v13

On Tue, 22 Apr 2008, Robin Holt wrote:

> putting it back into your patch/agreeing to it remaining in Andrea's
> patch?  If not, I think we can put this issue aside until Andrew gets
> out of the merge window and can decide it.  Either way, the patches
> become much more similar with this in.

One solution would be to separate the invalidate_page() callout into a
patch at the very end that can be omitted. AFACIT There is no compelling 
reason to have this callback and it complicates the API for the device 
driver writers. Not having this callback makes the way that mmu notifiers 
are called from the VM uniform which is a desirable goal.


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