linux-kernel - Re: [patch 1/3] mmu

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Message-ID: <Pine.LNX.4.64.0801311838070.26594@schroedinger.engr.sgi.com>
Date:	Thu, 31 Jan 2008 18:39:19 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Robin Holt <holt@....com>
cc:	Andrea Arcangeli <andrea@...ranet.com>,
	Avi Kivity <avi@...ranet.com>, Izik Eidus <izike@...ranet.com>,
	kvm-devel@...ts.sourceforge.net,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, steiner@....com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com
Subject: Re: [patch 1/3] mmu_notifier: Core code

On Thu, 31 Jan 2008, Robin Holt wrote:

> Jack has repeatedly pointed out needing an unregister outside the
> mmap_sem.  I still don't see the benefit to not having the lock in the mm.

I never understood why this would be needed. ->release removes the 
mmu_notifier right now.

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