From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753726AbaLAMyS (ORCPT ); Mon, 1 Dec 2014 07:54:18 -0500 Received: from cantor2.suse.de ([195.135.220.15]:38876 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752835AbaLAMyQ (ORCPT ); Mon, 1 Dec 2014 07:54:16 -0500 Message-ID: <547C64F3.9050005@suse.com> Date: Mon, 01 Dec 2014 13:54:11 +0100 From: Juergen Gross User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: David Vrabel , linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, x86@kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, andrew.cooper3@citrix.com Subject: Re: [PATCH V4 00/10] xen: Switch to virtual mapped linear p2m list References: <1417172039-8627-1-git-send-email-jgross@suse.com> <547C51AD.8070904@citrix.com> In-Reply-To: <547C51AD.8070904@citrix.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/01/2014 12:31 PM, David Vrabel wrote: > On 28/11/14 10:53, Juergen Gross wrote: >> Paravirtualized kernels running on Xen use a three level tree for >> translation of guest specific physical addresses to machine global >> addresses. This p2m tree is used for construction of page table >> entries, so the p2m tree walk is performance critical. >> >> By using a linear virtual mapped p2m list accesses to p2m elements >> can be sped up while even simplifying code. To achieve this goal >> some p2m related initializations have to be performed later in the >> boot process, as the final p2m list can be set up only after basic >> memory management functions are available. > > What are the results of the testing I asked for? You asked for those replying to the patch introducing the linear mapping. So I added the description of the tested scenarios in the patch description of that patch. > If Konrad or Boris are happy with this series I think it can go into 3.19. Great, thanks! Juergen