linux-kernel - Re: [PATCH] mmu notifiers #v8 + xpmem

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Message-Id: <1204475038.6240.47.camel@lappy>
Date:	Sun, 02 Mar 2008 17:23:58 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Andrea Arcangeli <andrea@...ranet.com>
Cc:	Jack Steiner <steiner@....com>, Nick Piggin <npiggin@...e.de>,
	akpm@...ux-foundation.org, Robin Holt <holt@....com>,
	Avi Kivity <avi@...ranet.com>, Izik Eidus <izike@...ranet.com>,
	kvm-devel@...ts.sourceforge.net, general@...ts.openfabrics.org,
	Steve Wise <swise@...ngridcomputing.com>,
	Roland Dreier <rdreier@...co.com>,
	Kanoj Sarcar <kanojsarcar@...oo.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	daniel.blueman@...drics.com, Christoph Lameter <clameter@....com>
Subject: Re: [PATCH] mmu notifiers #v8 + xpmem


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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