From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932488AbaLBSzQ (ORCPT ); Tue, 2 Dec 2014 13:55:16 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:45622 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932087AbaLBSzO (ORCPT ); Tue, 2 Dec 2014 13:55:14 -0500 Date: Tue, 2 Dec 2014 13:54:46 -0500 From: Konrad Rzeszutek Wilk To: Juergen Gross Cc: David Vrabel , linux-kernel@vger.kernel.org, xen-devel@lists.xensource.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 Message-ID: <20141202185446.GD32622@laptop.dumpdata.com> References: <1417172039-8627-1-git-send-email-jgross@suse.com> <547C51AD.8070904@citrix.com> <547C64F3.9050005@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <547C64F3.9050005@suse.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Source-IP: ucsinet21.oracle.com [156.151.31.93] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 01, 2014 at 01:54:11PM +0100, Juergen Gross wrote: > 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! I am happy. > > > Juergen >