From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755410AbZCNSXZ (ORCPT ); Sat, 14 Mar 2009 14:23:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752209AbZCNSXQ (ORCPT ); Sat, 14 Mar 2009 14:23:16 -0400 Received: from hera.kernel.org ([140.211.167.34]:55472 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751394AbZCNSXQ (ORCPT ); Sat, 14 Mar 2009 14:23:16 -0400 Message-ID: <49BBF59D.7060401@kernel.org> Date: Sat, 14 Mar 2009 11:21:17 -0700 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: Ingo Molnar CC: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-tip-commits@vger.kernel.org Subject: Re: [tip:x86/mm] x86: make e820_update_range() handle small range update References: <49B9F0C1.10402@kernel.org> <20090314121705.GA13685@elte.hu> In-Reply-To: <20090314121705.GA13685@elte.hu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > * Yinghai Lu wrote: > >> Commit-ID: 78a8b35bc7abf8b8333d6f625e08c0f7cc1c3742 >> Gitweb: http://git.kernel.org/tip/78a8b35bc7abf8b8333d6f625e08c0f7cc1c3742 >> Author: Yinghai Lu >> AuthorDate: Thu, 12 Mar 2009 22:36:01 -0700 >> Commit: Ingo Molnar >> CommitDate: Sat, 14 Mar 2009 12:20:07 +0100 >> >> x86: make e820_update_range() handle small range update >> >> Impact: enhance e820 code to handle more cases >> >> Try to handle new range which could be covered by one entry. >> >> Signed-off-by: Yinghai Lu >> Cc: jbeulich@novell.com >> LKML-Reference: <49B9F0C1.10402@kernel.org> >> Signed-off-by: Ingo Molnar > > -tip testing found a bootup crash + reboot due to this patch. > > config attached. The bootup crashes here: > > [ 0.000000] MTRR variable ranges enabled: > [ 0.000000] 0 base 0000000000 mask FFC0000000 write-back > [ 0.000000] 1 disabled > [ 0.000000] 2 disabled > [ 0.000000] 3 disabled > [ 0.000000] 4 disabled > [ 0.000000] 5 disabled > [ 0.000000] 6 disabled > [ 0.000000] 7 disabled > [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 > [ 0.000000] get_mtrr: cpu0 reg00 base=0000000000 size=0000040000 write-back > [ reboot ] > what does the e820 map look like? YH