Subject: Re: [PATCH] mmu notifiers #v8 + xpmem
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Andrea Arcangeli <andrea@qumranet.com>
Cc: Jack Steiner <steiner@sgi.com>, Nick Piggin <npiggin@suse.de>,
       akpm@linux-foundation.org, Robin Holt <holt@sgi.com>,
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       kvm-devel@lists.sourceforge.net, general@lists.openfabrics.org,
       Steve Wise <swise@opengridcomputing.com>,
       Roland Dreier <rdreier@cisco.com>, Kanoj Sarcar <kanojsarcar@yahoo.com>,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       daniel.blueman@quadrics.com, Christoph Lameter <clameter@sgi.com>
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Date: Sun, 02 Mar 2008 17:23:58 +0100
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On Sun, 2008-03-02 at 17:03 +0100, Andrea Arcangeli wrote:

> 4) Then finally the mmu_notifier_unregister must be dropped to make the
> mmu notifier sleep capable with RCU in the mmu_notifier() fast path.

Or require PREEMPTIBLE_RCU, that can handle sleeps..

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