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Date: Wed, 09 Apr 2008 00:46:49 +0300
From: Avi Kivity <avi@qumranet.com>
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To: Andrea Arcangeli <andrea@qumranet.com>
CC: Christoph Lameter <clameter@sgi.com>, akpm@linux-foundation.org,
       Nick Piggin <npiggin@suse.de>, Steve Wise <swise@opengridcomputing.com>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-mm@kvack.org,
       Kanoj Sarcar <kanojsarcar@yahoo.com>, Roland Dreier <rdreier@cisco.com>,
       Jack Steiner <steiner@sgi.com>, linux-kernel@vger.kernel.org,
       kvm-devel@lists.sourceforge.net, Robin Holt <holt@sgi.com>,
       general@lists.openfabrics.org, Hugh Dickins <hugh@veritas.com>
Subject: Re: [PATCH 0 of 9] mmu notifier #v12
References: <patchbomb.1207669443@duo.random>
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Andrea Arcangeli wrote:
> Note that mmu_notifier_unregister may also fail with -EINTR if there are
> signal pending or the system runs out of vmalloc space or physical memory,
> only exit_mmap guarantees that any kernel module can be unloaded in presence
> of an oom condition.
>
>   

That's unusual.  What happens to the notifier?  Suppose I destroy a vm 
without exiting the process, what happens if it fires?

-- 
Any sufficiently difficult bug is indistinguishable from a feature.