From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 27 Feb 2008 17:03:21 -0800 (PST) From: Christoph Lameter Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges In-Reply-To: <20080228005249.GF8091@v2.random> Message-ID: 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 Sender: owner-linux-mm@kvack.org Return-Path: To: Andrea Arcangeli 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 Thu, 28 Feb 2008, Andrea Arcangeli wrote: > On Wed, Feb 27, 2008 at 04:14:08PM -0800, Christoph Lameter wrote: > > Erm. This would also be needed by RDMA etc. > > The only RDMA I know is Quadrics, and Quadrics apparently doesn't need > to schedule inside the invalidate methods AFIK, so I doubt the above > is true. It'd be interesting to know if IB is like Quadrics and it > also doesn't require blocking to invalidate certain remote mappings. 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. -- 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