From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758747AbYFYS4N (ORCPT ); Wed, 25 Jun 2008 14:56:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758527AbYFYSz5 (ORCPT ); Wed, 25 Jun 2008 14:55:57 -0400 Received: from smtp.eu.citrix.com ([62.200.22.115]:50493 "EHLO SMTP.EU.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758052AbYFYSz4 (ORCPT ); Wed, 25 Jun 2008 14:55:56 -0400 X-Greylist: delayed 606 seconds by postgrey-1.27 at vger.kernel.org; Wed, 25 Jun 2008 14:55:56 EDT X-IronPort-AV: E=Sophos;i="4.27,703,1204502400"; d="scan'208";a="758412" User-Agent: Microsoft-Entourage/11.4.0.080122 Date: Wed, 25 Jun 2008 19:45:36 +0100 Subject: Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen support From: Keir Fraser To: Andi Kleen , Jeremy Fitzhardinge CC: Mark McLoughlin , xen-devel , Eduardo Habkost , LKML , Stephen Tweedie Message-ID: Thread-Topic: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen support Thread-Index: AcjW86fC5gcDXELmEd2ISwAX8io7RQ== In-Reply-To: <87skv1r8ln.fsf@basil.nowhere.org> Mime-version: 1.0 Content-type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit X-OriginalArrivalTime: 25 Jun 2008 18:45:45.0007 (UTC) FILETIME=[AD20E3F0:01C8D6F3] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 25/6/08 13:40, "Andi Kleen" wrote: >> to 0xffff880000000000. I have no general justification for this: th > > This will significantly decrease the maximum amount of physical > memory supported by Linux longer term. What does Linux expect to scale up to? Reserving 16 PML4 entries leaves the kernel with 120TB of available 'negative' address space. Should be plenty, I would think. -- Keir