From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754147AbYGIRAX (ORCPT ); Wed, 9 Jul 2008 13:00:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750992AbYGIRAJ (ORCPT ); Wed, 9 Jul 2008 13:00:09 -0400 Received: from mga11.intel.com ([192.55.52.93]:48355 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750984AbYGIRAI (ORCPT ); Wed, 9 Jul 2008 13:00:08 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.30,332,1212390000"; d="scan'208";a="350666570" Date: Wed, 9 Jul 2008 10:00:06 -0700 From: Suresh Siddha To: Yinghai Lu Cc: "Siddha, Suresh B" , "mingo@elte.hu" , "hpa@zytor.com" , "tglx@linutronix.de" , "linux-kernel@vger.kernel.org" Subject: Re: [patch] tip/x86_64: fix e820 merge issue which broke max_pfn_mapped Message-ID: <20080709170005.GF1678@linux-os.sc.intel.com> References: <20080708230837.GD1678@linux-os.sc.intel.com> <86802c440807081759i3baafa9bj7e8ff544a1a78fb9@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <86802c440807081759i3baafa9bj7e8ff544a1a78fb9@mail.gmail.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 08, 2008 at 05:59:39PM -0700, Yinghai Lu wrote: > On Tue, Jul 8, 2008 at 4:08 PM, Suresh Siddha wrote: > > With out this 64bit tip/master doesn't boot using ACPI on my system. > > --- > > > > max_pfn_mapped should include all e820 entries. > > The direct mapping extends to max_pfn_mapped, so that we can directly access > > apertures, ACPI and other tables without having to play with fixmaps. > > > > With this, my system with 1GB memory boots fine with ACPI enabled. > > so without this patch, your system doesn't boot? It doesn't enable ACPI and hence doesn't bringup SMP etc etc..