From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754566AbYAWORl (ORCPT ); Wed, 23 Jan 2008 09:17:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752472AbYAWORd (ORCPT ); Wed, 23 Jan 2008 09:17:33 -0500 Received: from bzq-179-150-194.static.bezeqint.net ([212.179.150.194]:36667 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752223AbYAWORc (ORCPT ); Wed, 23 Jan 2008 09:17:32 -0500 Message-ID: <47974C78.7050509@qumranet.com> Date: Wed, 23 Jan 2008 16:17:28 +0200 From: Avi Kivity User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Robin Holt CC: Gerd Hoffmann , Christoph Lameter , Andrea Arcangeli , Andrew Morton , Nick Piggin , linux-mm@kvack.org, Benjamin Herrenschmidt , steiner@sgi.com, linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net, daniel.blueman@quadrics.com, Hugh Dickins Subject: Re: [kvm-devel] [PATCH] export notifier #1 References: <478E4356.7030303@qumranet.com> <20080117162302.GI7170@v2.random> <478F9C9C.7070500@qumranet.com> <20080117193252.GC24131@v2.random> <20080121125204.GJ6970@v2.random> <4795F9D2.1050503@qumranet.com> <20080122144332.GE7331@v2.random> <20080122200858.GB15848@v2.random> <4797384B.7080200@redhat.com> <20080123131939.GJ26420@sgi.com> In-Reply-To: <20080123131939.GJ26420@sgi.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Robin Holt wrote: > On Wed, Jan 23, 2008 at 01:51:23PM +0100, Gerd Hoffmann wrote: > >> Jumping in here, looks like this could develop into a direction useful >> for Xen. >> >> Background: Xen has a mechanism called "grant tables" for page sharing. >> Guest #1 can issue a "grant" for another guest #2, which in turn then >> can use that grant to map the page owned by guest #1 into its address >> space. This is used by the virtual network/disk drivers, i.e. typically >> Domain-0 (which has access to the real hardware) maps pages of other >> guests to fill in disk/network data. >> > > This is extremely similar to what XPMEM is providing. > > I think that in Xen's case the page tables are the normal cpu page tables, not an external mmu (like RDMA, kvm, and XPMEM). -- error compiling committee.c: too many arguments to function From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH] export notifier #1 Date: Wed, 23 Jan 2008 16:17:28 +0200 Message-ID: <47974C78.7050509@qumranet.com> References: <478E4356.7030303@qumranet.com> <20080117162302.GI7170@v2.random> <478F9C9C.7070500@qumranet.com> <20080117193252.GC24131@v2.random> <20080121125204.GJ6970@v2.random> <4795F9D2.1050503@qumranet.com> <20080122144332.GE7331@v2.random> <20080122200858.GB15848@v2.random> <4797384B.7080200@redhat.com> <20080123131939.GJ26420@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andrew Morton , Nick Piggin , Andrea Arcangeli , kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Benjamin Herrenschmidt , steiner-sJ/iWh9BUns@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, daniel.blueman-xqY44rlHlBpWk0Htik3J/w@public.gmane.org, Gerd Hoffmann , Hugh Dickins , Christoph Lameter To: Robin Holt Return-path: In-Reply-To: <20080123131939.GJ26420-sJ/iWh9BUns@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Robin Holt wrote: > On Wed, Jan 23, 2008 at 01:51:23PM +0100, Gerd Hoffmann wrote: > >> Jumping in here, looks like this could develop into a direction useful >> for Xen. >> >> Background: Xen has a mechanism called "grant tables" for page sharing. >> Guest #1 can issue a "grant" for another guest #2, which in turn then >> can use that grant to map the page owned by guest #1 into its address >> space. This is used by the virtual network/disk drivers, i.e. typically >> Domain-0 (which has access to the real hardware) maps pages of other >> guests to fill in disk/network data. >> > > This is extremely similar to what XPMEM is providing. > > I think that in Xen's case the page tables are the normal cpu page tables, not an external mmu (like RDMA, kvm, and XPMEM). -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- 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 Message-ID: <47974C78.7050509@qumranet.com> Date: Wed, 23 Jan 2008 16:17:28 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [kvm-devel] [PATCH] export notifier #1 References: <478E4356.7030303@qumranet.com> <20080117162302.GI7170@v2.random> <478F9C9C.7070500@qumranet.com> <20080117193252.GC24131@v2.random> <20080121125204.GJ6970@v2.random> <4795F9D2.1050503@qumranet.com> <20080122144332.GE7331@v2.random> <20080122200858.GB15848@v2.random> <4797384B.7080200@redhat.com> <20080123131939.GJ26420@sgi.com> In-Reply-To: <20080123131939.GJ26420@sgi.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Robin Holt Cc: Gerd Hoffmann , Christoph Lameter , Andrea Arcangeli , Andrew Morton , Nick Piggin , linux-mm@kvack.org, Benjamin Herrenschmidt , steiner@sgi.com, linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net, daniel.blueman@quadrics.com, Hugh Dickins List-ID: Robin Holt wrote: > On Wed, Jan 23, 2008 at 01:51:23PM +0100, Gerd Hoffmann wrote: > >> Jumping in here, looks like this could develop into a direction useful >> for Xen. >> >> Background: Xen has a mechanism called "grant tables" for page sharing. >> Guest #1 can issue a "grant" for another guest #2, which in turn then >> can use that grant to map the page owned by guest #1 into its address >> space. This is used by the virtual network/disk drivers, i.e. typically >> Domain-0 (which has access to the real hardware) maps pages of other >> guests to fill in disk/network data. >> > > This is extremely similar to what XPMEM is providing. > > I think that in Xen's case the page tables are the normal cpu page tables, not an external mmu (like RDMA, kvm, and XPMEM). -- error compiling committee.c: too many arguments to function -- 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