From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751412AbYIEUWS (ORCPT ); Fri, 5 Sep 2008 16:22:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751944AbYIEUWG (ORCPT ); Fri, 5 Sep 2008 16:22:06 -0400 Received: from terminus.zytor.com ([198.137.202.10]:60024 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751608AbYIEUWG (ORCPT ); Fri, 5 Sep 2008 16:22:06 -0400 Message-ID: <48C19415.9060108@kernel.org> Date: Fri, 05 Sep 2008 13:18:29 -0700 From: "H. Peter Anvin" Organization: Linux Kernel Organization, Inc. User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Peter Zijlstra CC: Luca Tettamanti , linux-kernel@vger.kernel.org, mingo@redhat.com Subject: Re: [2.6.27] overlapping early reservations [was: early exception - lockdep related?] References: <68676e00809051217h3da02a6bld4412b4a2ee3b728@mail.gmail.com> <1220642738.11202.21.camel@twins.programming.kicks-ass.net> In-Reply-To: <1220642738.11202.21.camel@twins.programming.kicks-ass.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Peter Zijlstra wrote: > On Fri, 2008-09-05 at 21:17 +0200, Luca Tettamanti wrote: >> On Thu, Sep 4, 2008 at 10:51 PM, Luca Tettamanti wrote: >>> On Thu, Sep 4, 2008 at 4:25 PM, Peter Zijlstra wrote: >>>> Sadly your config just boots, albeit not to userspace due to missing >>>> drivers. >>> Yes, I managed to boot it with qemu... I tried kgdb - without luck - >>> kernel dies too early. >>> I also managed to get a stack trace :D >>> >>> http://img151.imageshack.us/my.php?image=tracedm1.jpg >>> >>> It seems that lockdep is an innocent bystander... the kernel died with >>> panic() in __reserve_early, and then took another exception while >>> printing the panic (I guess). >>> Will add further debug stuff to see wtf is going on. >> Hum, kernel says: >> >> http://img177.imageshack.us/my.php?image=overlappingus2.jpg >> >> Overlapping early reservations b98000-eff266 RAMDISK to 200000-d09cf7 >> TEXT DATA BSS >> >> It would appear that the initramfs is overlapping the kernel itself, >> is the boot loader (LILO) doing something stupid? > > Suppose it is, lets ask hpa.. > It definitely looks like it. -hpa