From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <479750CA.4070101@redhat.com> Date: Wed, 23 Jan 2008 15:35:54 +0100 From: Gerd Hoffmann MIME-Version: 1.0 Subject: Re: [kvm-devel] [PATCH] export notifier #1 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> In-Reply-To: <20080123141814.GE3058@sgi.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Robin Holt Cc: Christoph Lameter , Andrea Arcangeli , Andrew Morton , Nick Piggin , linux-mm@kvack.org, Benjamin Herrenschmidt , steiner@sgi.com, linux-kernel@vger.kernel.org, Avi Kivity , kvm-devel@lists.sourceforge.net, daniel.blueman@quadrics.com, Hugh Dickins List-ID: 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 -- 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