linux-kernel - Re: [PATCH 01 of 12] Core of mmu notifiers

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Message-ID: <20080423170909.GA1459@sgi.com>
Date:	Wed, 23 Apr 2008 12:09:09 -0500
From:	Jack Steiner <steiner@....com>
To:	Andrea Arcangeli <andrea@...ranet.com>
Cc:	Christoph Lameter <clameter@....com>,
	Nick Piggin <npiggin@...e.de>,
	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, Robin Holt <holt@....com>,
	general@...ts.openfabrics.org, Hugh Dickins <hugh@...itas.com>,
	akpm@...ux-foundation.org, Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 01 of 12] Core of mmu notifiers


You may have spotted this already. If so, just ignore this.

It looks like there is a bug in copy_page_range() around line 667.
It's possible to do a mmu_notifier_invalidate_range_start(), then
return -ENOMEM w/o doing a corresponding mmu_notifier_invalidate_range_end().

--- jack


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