From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755139AbWKMQ6N (ORCPT ); Mon, 13 Nov 2006 11:58:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755206AbWKMQyL (ORCPT ); Mon, 13 Nov 2006 11:54:11 -0500 Received: from e34.co.us.ibm.com ([32.97.110.152]:5802 "EHLO e34.co.us.ibm.com") by vger.kernel.org with ESMTP id S1755214AbWKMQyF (ORCPT ); Mon, 13 Nov 2006 11:54:05 -0500 Date: Mon, 13 Nov 2006 11:21:35 -0500 From: Vivek Goyal To: linux kernel mailing list Cc: Reloc Kernel List , ebiederm@xmission.com, akpm@osdl.org, ak@suse.de, hpa@zytor.com, magnus.damm@gmail.com, lwang@redhat.com, dzickus@redhat.com Subject: [RFC] [PATCH 0/16] x86_64: Relocatable bzImage Support (V2) Message-ID: <20061113162135.GA17429@in.ibm.com> Reply-To: vgoyal@in.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi All, Eric Biederman implemented the relocatable bzImage for x86_64 and posted patches for comments quite some time back. http://marc.theaimsgroup.com/?l=linux-kernel&m=115443019026302&w=2 We have been testing the patches in RHEL kernels since then and things are looking up. I think this is the time that patches can be included in -mm and get more testing done and get rest of the issues sorted out. Eric is currently held up with other things, so I have taken his patches and forward ported to 2.6.19-rc5-git2. Did few cleanups and fixed few bugs as faced in our testing. I have also accomodated the review comments received last time. These changes make a bzImage and vmlinux relocatable hence kernel can be loaded at and run from a non-1MB location. These changes are especially useful for kdump where a single kernel can be used both as production kernel and dump capture kernel hence making the life easier both for distros and developers. Following is a brief account of changes I have done since patches were posted last time. - Forward ported the changes to latest kernel. - Extended bzImage protocol to handle relocatable kernel - Dropped support for elf bzImage - Dropped support for the serial debugging in decompressor code. - Fixed a bug related to memory hotplug. - Fixed a bug related to setting NX bit (Thanks to larry woodman) - Fixed a bug regarding jumping to secondary_startup_64 instead of assuming that align fills empty space with "nop". - Fixed a bug regarding phys_base being put in initdata section. - Fixed a but where bss was not being zeroed properly - Reverted the change back to cotinue to compile the kernel for 2MB so that loaders loading vmlinux directly are not broken. - Aligned data segment to 4K boundary to make kexec using vmlinux work. - Tested to patch for making sure suspend/resume to/from memory is working. (Required due to ACPI wake up code changes) Your comments/suggestions are welcome. Thanks Vivek