From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932090Ab2GAPeT (ORCPT ); Sun, 1 Jul 2012 11:34:19 -0400 Received: from terminus.zytor.com ([198.137.202.10]:42236 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751422Ab2GAPeQ (ORCPT ); Sun, 1 Jul 2012 11:34:16 -0400 Message-ID: <4FF06DF4.4000006@zytor.com> Date: Sun, 01 Jul 2012 08:34:12 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: "Eric W. Biederman" CC: hacklu , linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] x86, boot: Optimize the elf header handling. References: <4FB492F7.8050401@gmail.com> <87ipf9gtsb.fsf@xmission.com> <4FCAD590.8000506@zytor.com> <87obp0bxdv.fsf@xmission.com> <4FCB602B.70907@zytor.com> <87fwacb0jq.fsf_-_@xmission.com> <877gvob0g4.fsf_-_@xmission.com> <4FF06701.6010004@zytor.com> In-Reply-To: <4FF06701.6010004@zytor.com> 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 On 07/01/2012 08:04 AM, H. Peter Anvin wrote: > > Sadly, this patch breaks the boot with of of my standard configurations > (attached)... it goes into an infinite reboot loop. This was the first > config I tested, so it might very well break more. > Some more investigation: the boot crashes because the .data..percpu segment is all zero -- since this includes the GDT, we die quickly and dramatically only a handful of instructions into head_64.S. I'm dropping this patchset for now. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.