From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932537AbYB1BKh (ORCPT ); Wed, 27 Feb 2008 20:10:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758837AbYB1BK3 (ORCPT ); Wed, 27 Feb 2008 20:10:29 -0500 Received: from host36-195-149-62.serverdedicati.aruba.it ([62.149.195.36]:44901 "EHLO mx.cpushare.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757029AbYB1BK2 (ORCPT ); Wed, 27 Feb 2008 20:10:28 -0500 Date: Thu, 28 Feb 2008 02:10:20 +0100 From: Andrea Arcangeli To: Christoph Lameter Cc: Nick Piggin , akpm@linux-foundation.org, Robin Holt , Avi Kivity , Izik Eidus , kvm-devel@lists.sourceforge.net, Peter Zijlstra , general@lists.openfabrics.org, Steve Wise , Roland Dreier , Kanoj Sarcar , steiner@sgi.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, daniel.blueman@quadrics.com Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges Message-ID: <20080228011020.GG8091@v2.random> References: <20080215064859.384203497@sgi.com> <20080215064932.620773824@sgi.com> <200802201008.49933.nickpiggin@yahoo.com.au> <20080228001104.GB8091@v2.random> <20080228005249.GF8091@v2.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 27, 2008 at 05:03:21PM -0800, Christoph Lameter wrote: > RDMA works across a network and I would assume that it needs confirmation > that a connection has been torn down before pages can be unmapped. Depends on the latency of the network, for example with page pinning it can even try to reduce the wait time, by tearing down the mapping in range_begin and spin waiting the ack only later in range_end. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrea Arcangeli Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges Date: Thu, 28 Feb 2008 02:10:20 +0100 Message-ID: <20080228011020.GG8091@v2.random> References: <20080215064859.384203497@sgi.com> <20080215064932.620773824@sgi.com> <200802201008.49933.nickpiggin@yahoo.com.au> <20080228001104.GB8091@v2.random> <20080228005249.GF8091@v2.random> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Nick Piggin , steiner@sgi.com, Peter Zijlstra , linux-mm@kvack.org, Kanoj Sarcar , Roland Dreier , Steve Wise , linux-kernel@vger.kernel.org, Avi Kivity , kvm-devel@lists.sourceforge.net, daniel.blueman@quadrics.com, Robin Holt , general@lists.openfabrics.org, akpm@linux-foundation.org To: Christoph Lameter Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org On Wed, Feb 27, 2008 at 05:03:21PM -0800, Christoph Lameter wrote: > RDMA works across a network and I would assume that it needs confirmation > that a connection has been torn down before pages can be unmapped. Depends on the latency of the network, for example with page pinning it can even try to reduce the wait time, by tearing down the mapping in range_begin and spin waiting the ack only later in range_end. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 28 Feb 2008 02:10:20 +0100 From: Andrea Arcangeli Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges Message-ID: <20080228011020.GG8091@v2.random> References: <20080215064859.384203497@sgi.com> <20080215064932.620773824@sgi.com> <200802201008.49933.nickpiggin@yahoo.com.au> <20080228001104.GB8091@v2.random> <20080228005249.GF8091@v2.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Nick Piggin , akpm@linux-foundation.org, Robin Holt , Avi Kivity , Izik Eidus , kvm-devel@lists.sourceforge.net, Peter Zijlstra , general@lists.openfabrics.org, Steve Wise , Roland Dreier , Kanoj Sarcar , steiner@sgi.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, daniel.blueman@quadrics.com List-ID: On Wed, Feb 27, 2008 at 05:03:21PM -0800, Christoph Lameter wrote: > RDMA works across a network and I would assume that it needs confirmation > that a connection has been torn down before pages can be unmapped. Depends on the latency of the network, for example with page pinning it can even try to reduce the wait time, by tearing down the mapping in range_begin and spin waiting the ack only later in range_end. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org