Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751026AbWJFC1z (ORCPT ); Thu, 5 Oct 2006 22:27:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751683AbWJFC1z (ORCPT ); Thu, 5 Oct 2006 22:27:55 -0400 Received: from sv1.valinux.co.jp ([210.128.90.2]:49334 "EHLO sv1.valinux.co.jp") by vger.kernel.org with ESMTP id S1751021AbWJFC1y (ORCPT ); Thu, 5 Oct 2006 22:27:54 -0400 Subject: Re: 2.6.19-rc1: kexec broken on x86_64 From: Magnus Damm To: vgoyal@in.ibm.com Cc: Magnus Damm , Linux Kernel Mailing List , fastboot@lists.osdl.org, "Eric W. Biederman" , Horms , Andi Kleen , Ian.Campbell@XenSource.com In-Reply-To: <20061005163347.GD20551@in.ibm.com> References: <20061005134522.GB20551@in.ibm.com> <20061005163347.GD20551@in.ibm.com> Content-Type: text/plain Date: Fri, 06 Oct 2006 11:28:27 +0900 Message-Id: <1160101707.6870.8.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3080 Lines: 75 On Thu, 2006-10-05 at 12:33 -0400, Vivek Goyal wrote: > On Thu, Oct 05, 2006 at 10:56:51PM +0900, Magnus Damm wrote: > > Hi Vivek, > > > > On 10/5/06, Vivek Goyal wrote: > > >On Thu, Oct 05, 2006 at 07:28:35PM +0900, Magnus Damm wrote: > > >> Kexec is broken on x86_64 under 2.6.19-rc1. > > >> > > >> Or rather - kexec works ok under 2.6.19-rc1, but something related to > > >> the vmlinux format has probably changed and kexec-tools fails to load > > >> a vmlinux from 2.6.19-rc1. > > >> > > >> Loading bzImage works as usual, but vmlinux does not load properly. > > >> > > >> The kexec binary fails with the following message: > > >> > > >> Overlapping memory segments at 0x351000 > > >> sort_segments failed > > >> / # > > >> > > > > > >Hi Magnus, > > > > > >Can you please post the readelf -l output of the vmlinux you are trying > > >to load. That's will give some indication if the segments are really > > >overlapping in vmlinux or is it some processing bug at kexec-tools part. > > > > Elf file type is EXEC (Executable file) > > Entry point 0x100100 > > There are 4 program headers, starting at offset 64 > > > > Program Headers: > > Type Offset VirtAddr PhysAddr > > FileSiz MemSiz Flags Align > > LOAD 0x0000000000100000 0xffffffff80100000 0x0000000000100000 > > 0x00000000001a4888 0x00000000001a4888 R E 100000 > > LOAD 0x00000000002a5000 0xffffffff802a5000 0x00000000002a5000 > > 0x000000000008e086 0x00000000000c1504 RWE 100000 > > LOAD 0x0000000000400000 0xffffffffff600000 0x00000000002fd000 > > 0x0000000000000c08 0x0000000000000c08 RWE 100000 > > NOTE 0x0000000000000000 0x0000000000000000 0x0000000000000000 > > 0x0000000000000000 0x0000000000000000 R 8 > > > > Section to Segment mapping: > > Segment Sections... > > 00 .text __ex_table .rodata .pci_fixup __ksymtab __ksymtab_gpl > > __ksymtab_unused __ksymtab_strings __param > > 01 .data .data.cacheline_aligned .data.read_mostly > > .data.init_task .data.page_aligned .init.text .init.data .init.setup > > .initcall.init .con_initcall.init .altinstructions > > .altinstr_replacement .exit.text .init.ramfs .bss > > 02 .vsyscall_0 .xtime_lock .vxtime .vgetcpu_mode .sys_tz > > .sysctl_vsyscall .xtime .jiffies .vsyscall_1 .vsyscall_2 .vsyscall_3 > > 03 > > > > Hi Magnus, > > I think this got introduced because of Ian Cambell's patch for creating > PT_NOTE headers. Can you please try attached patch. I think it should > fix the issue. You are right, the patch solves the problem. It is now possible to use kexec on x86_64 to reboot into a vmlinux built from 2.6.19-rc1 + your patch. Nice work, thanks! / magnus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/