From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Demand paging for memory regions (was Re: MMU Notifiers V6) References: <20080208234302.GH26564@sgi.com> <20080208155641.2258ad2c.akpm@linux-foundation.org> <20080209012446.GB7051@v2.random> <20080209015659.GC7051@v2.random> <20080209075556.63062452@bree.surriel.com> From: Roland Dreier Date: Mon, 11 Feb 2008 14:40:12 -0800 In-Reply-To: (Christoph Lameter's message of "Sat, 9 Feb 2008 13:46:34 -0800 (PST)") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org Return-Path: To: general@lists.openfabrics.org Cc: Christoph Lameter , Rik van Riel , Andrea Arcangeli , a.p.zijlstra@chello.nl, izike@qumranet.com, steiner@sgi.com, linux-kernel@vger.kernel.org, avi@qumranet.com, linux-mm@kvack.org, daniel.blueman@quadrics.com, Robin Holt , Andrew Morton , kvm-devel@lists.sourceforge.net List-ID: [Adding general@lists.openfabrics.org to get the IB/RDMA people involved] This thread has patches that add support for notifying drivers when a process's memory map changes. The hope is that this is useful for letting RDMA devices handle registered memory without pinning the underlying pages, by updating the RDMA device's translation tables whenever the host kernel's tables change. Is anyone interested in working on using this for drivers/infiniband? I am interested in participating, but I don't think I have enough time to do this by myself. Also, at least naively it seems that this is only useful for hardware that has support for this type of demand paging, and can handle not-present pages, generating interrupts for page faults, etc. I know that Mellanox HCAs should have this support; are there any other devices that can do this? The beginning of this thread is at . - R. -- 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