From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932291AbXIETfw (ORCPT ); Wed, 5 Sep 2007 15:35:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932096AbXIETfp (ORCPT ); Wed, 5 Sep 2007 15:35:45 -0400 Received: from il.qumranet.com ([82.166.9.18]:51454 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932094AbXIETfo (ORCPT ); Wed, 5 Sep 2007 15:35:44 -0400 Message-ID: <46DF045F.4020806@qumranet.com> Date: Wed, 05 Sep 2007 22:32:47 +0300 From: Avi Kivity User-Agent: Thunderbird 2.0.0.5 (X11/20070719) MIME-Version: 1.0 To: Rik van Riel CC: linux-mm@kvack.org, shaohua.li@intel.com, kvm-devel , general@lists.openfabrics.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH][RFC]: pte notifiers -- support for external page tables References: <11890103283456-git-send-email-avi@qumranet.com> <46DEFDF4.5000900@redhat.com> <46DF0013.4060804@qumranet.com> <46DF0234.7090504@redhat.com> In-Reply-To: <46DF0234.7090504@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rik van Riel wrote: >> >> I imagine that many of the paravirt_ops mmu hooks will need to be >> exposed as pte notifiers. This can't be done as part of the >> paravirt_ops code due to the need to pass high level data structures, >> though. > > Wait, I thought that paravirt_ops was all on the side of the > guest kernel, where these host kernel operations are invisible? > It is, but the hooks are in much the same places. It could be argued that you'd embed pte notifiers in paravirt_ops for a host kernel, but that's not doable because pte notifiers use higher-level data strutures (like vmas). -- Any sufficiently difficult bug is indistinguishable from a feature.