Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933929AbYCDWm6 (ORCPT ); Tue, 4 Mar 2008 17:42:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763288AbYCDWmc (ORCPT ); Tue, 4 Mar 2008 17:42:32 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:55023 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762452AbYCDWmb (ORCPT ); Tue, 4 Mar 2008 17:42:31 -0500 Subject: Re: [RFC] Notifier for Externally Mapped Memory (EMM) From: Peter Zijlstra To: Christoph Lameter Cc: Andrea Arcangeli , Jack Steiner , Nick Piggin , akpm@linux-foundation.org, Robin Holt , Avi Kivity , kvm-devel@lists.sourceforge.net, general@lists.openfabrics.org, Steve Wise , Roland Dreier , Kanoj Sarcar , linux-kernel@vger.kernel.org, linux-mm@kvack.org, daniel.blueman@quadrics.com In-Reply-To: References: <20080221144023.GC9427@v2.random> <20080221161028.GA14220@sgi.com> <20080227192610.GF28483@v2.random> <20080302155457.GK8091@v2.random> <20080303213707.GA8091@v2.random> <20080303220502.GA5301@v2.random> <47CC9B57.5050402@qumranet.com> <20080304133020.GC5301@v2.random> <20080304222030.GB8951@v2.random> Content-Type: text/plain Date: Tue, 04 Mar 2008 23:42:09 +0100 Message-Id: <1204670529.6241.52.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.21.90 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 597 Lines: 16 On Tue, 2008-03-04 at 14:35 -0800, Christoph Lameter wrote: > RCU means that the callbacks occur in an atomic context. Not really, if it requires moving the VM locks to sleepable locks under a .config option, I think its also fair to require PREEMPT_RCU. OTOH, if you want to unconditionally move the VM locks to sleepable locks you have a point. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/