Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751415AbaKGO6U (ORCPT ); Fri, 7 Nov 2014 09:58:20 -0500 Received: from smtp.citrix.com ([66.165.176.89]:11044 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751141AbaKGO6T (ORCPT ); Fri, 7 Nov 2014 09:58:19 -0500 X-IronPort-AV: E=Sophos;i="5.07,332,1413244800"; d="scan'208";a="189152120" Message-ID: <545CDDF6.9080902@citrix.com> Date: Fri, 7 Nov 2014 14:57:58 +0000 From: David Vrabel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Icedove/24.5.0 MIME-Version: 1.0 To: Juergen Gross , , , , , , , , , Subject: Re: [Xen-devel] [PATCH V2 1/5] Xen: Delay remapping memory of pv-domain References: <1415252853-7106-1-git-send-email-jgross@suse.com> <1415252853-7106-2-git-send-email-jgross@suse.com> In-Reply-To: <1415252853-7106-2-git-send-email-jgross@suse.com> Content-Type: text/plain; charset="ISO-8859-1" 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 06/11/14 05:47, Juergen Gross wrote: > Early in the boot process the memory layout of a pv-domain is changed > to match the E820 map (either the host one for Dom0 or the Xen one) > regarding placement of RAM and PCI holes. This requires removing memory > pages initially located at positions not suitable for RAM and adding > them later at higher addresses where no restrictions apply. > > To be able to operate on the hypervisor supported p2m list until a > virtual mapped linear p2m list can be constructed, remapping must > be delayed until virtual memory management is initialized, as the > initial p2m list can't be extended unlimited at physical memory > initialization time due to it's fixed structure. > > A further advantage is the reduction in complexity and code volume as > we don't have to be careful regarding memory restrictions during p2m > updates. Reviewed-by: David Vrabel But I would like a second reviewed-by. David -- 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/