From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753362AbaLALcZ (ORCPT ); Mon, 1 Dec 2014 06:32:25 -0500 Received: from smtp02.citrix.com ([66.165.176.63]:21979 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752945AbaLALcY (ORCPT ); Mon, 1 Dec 2014 06:32:24 -0500 X-IronPort-AV: E=Sophos;i="5.07,493,1413244800"; d="scan'208";a="198352434" Message-ID: <547C51AD.8070904@citrix.com> Date: Mon, 1 Dec 2014 11:31:57 +0000 From: David Vrabel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.2.0 MIME-Version: 1.0 To: Juergen Gross , , , , , , , , , Subject: Re: [PATCH V4 00/10] xen: Switch to virtual mapped linear p2m list References: <1417172039-8627-1-git-send-email-jgross@suse.com> In-Reply-To: <1417172039-8627-1-git-send-email-jgross@suse.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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? If Konrad or Boris are happy with this series I think it can go into 3.19. David