From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755764AbZLJTe1 (ORCPT ); Thu, 10 Dec 2009 14:34:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754758AbZLJTeY (ORCPT ); Thu, 10 Dec 2009 14:34:24 -0500 Received: from hera.kernel.org ([140.211.167.34]:52842 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754584AbZLJTeX (ORCPT ); Thu, 10 Dec 2009 14:34:23 -0500 Message-ID: <4B214D00.90908@kernel.org> Date: Thu, 10 Dec 2009 11:33:20 -0800 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Roland Dreier CC: Jens Axboe , Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , "linux-kernel@vger.kernel.org" Subject: Re: Bisected regression References: <20091210091040.GG8742@kernel.dk> <20091210103945.GI8742@kernel.dk> <20091210160640.GB27794@elte.hu> <67EA4830-231F-45C9-A1A6-CE1C6CD9493D@kernel.org> <20091210180727.GK8742@kernel.dk> <4B213F1F.2020305@kernel.org> <4B2140F8.3020201@kernel.org> <20091210184506.GP8742@kernel.dk> <20091210190742.GS8742@kernel.dk> <4B2149B4.9060900@kernel.org> In-Reply-To: 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 Roland Dreier wrote: > > that is funny. we may need to use find early for our TRAMPOLINE...? > > > otherwise your mptable is corrupted.... > > Wouldn't surprise me if mptable is messed up... most likely BIOS people > take more care to get ACPI right. > > I'm not an expert on this stuff, but do we need the mptable if ACPI info > is there? that BIOS is using first 64k for mptable. and after booting those mptable is overwritten by trampoline. before that happen, kernel already analyse the table and get enough info. so when you boot with acpi=off and then try to kexec second kernel still with acpi=off, you will not get booted. YH