Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754579AbYAWOgx (ORCPT ); Wed, 23 Jan 2008 09:36:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752258AbYAWOgq (ORCPT ); Wed, 23 Jan 2008 09:36:46 -0500 Received: from mx1.redhat.com ([66.187.233.31]:52667 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752057AbYAWOgp (ORCPT ); Wed, 23 Jan 2008 09:36:45 -0500 Message-ID: <479750CA.4070101@redhat.com> Date: Wed, 23 Jan 2008 15:35:54 +0100 From: Gerd Hoffmann User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 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 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> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 788 Lines: 19 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/