From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [PATCH] export notifier #1 Date: Wed, 23 Jan 2008 15:35:54 +0100 Message-ID: <479750CA.4070101@redhat.com> References: <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> <47974B54.30407@redhat.com> <20080123141814.GE3058@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, Avi Kivity , linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, daniel.blueman-xqY44rlHlBpWk0Htik3J/w@public.gmane.org, Hugh Dickins , Christoph Lameter To: Robin Holt Return-path: In-Reply-To: <20080123141814.GE3058-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: > We have a seg structure which is similar to some structure you probably > have which describes the grant. One of the things hanging off that > seg structure is essentially a page table containing PFNs with their > respective flags (XPMEM specific and not the same as the pfn flags in > the processor page tables). i.e. page tables used by hardware != cpu, right? In the Xen guest case the normal processor page tables are modified, but in a special way to make the Xen hypervisor also release the grant. cheers, Gerd ------------------------------------------------------------------------- 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/