linux-kernel - Re: [PATCH 0 of 9] mmu notifier #v12

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Message-ID: <47FBE7C9.9000701@qumranet.com>
Date:	Wed, 09 Apr 2008 00:46:49 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Andrea Arcangeli <andrea@...ranet.com>
CC:	Christoph Lameter <clameter@....com>, akpm@...ux-foundation.org,
	Nick Piggin <npiggin@...e.de>,
	Steve Wise <swise@...ngridcomputing.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-mm@...ck.org,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	Roland Dreier <rdreier@...co.com>,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org,
	kvm-devel@...ts.sourceforge.net, Robin Holt <holt@....com>,
	general@...ts.openfabrics.org, Hugh Dickins <hugh@...itas.com>
Subject: Re: [PATCH 0 of 9] mmu notifier #v12

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.

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