Bug 244072
| Summary: | Xen Kdump: i386 xen vmcore incomplete (no xen notes) | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Dave Anderson <anderson> |
| Component: | kernel-xen | Assignee: | Xen Maintainance List <xen-maint> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Martin Jenner <mjenner> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.1 | CC: | jarod, kraxel, sct, xen-maint |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | rhel-5.1 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-02-27 14:03:52 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
change QA contact Note that this issue was resolved in the kernel, post-2.6.18-20.el5.kraxel.6, and also requires the in-progress kexec-tools RHEL5.1 errata: RHBA-2007:0548 - kexec-tools bug fix and enhancement update http://errata.devel.redhat.com/errata/erratainfo.cgi?advisory=5643 |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030611 Description of problem: Installed kernel-2.6.18-20.el5.kraxel.6. /etc/sysconfig/kdump set to use bare-metal kernel as secondary kdump kernel: KDUMP_KERNELVER="2.6.18-20.el5.kraxel.6" /etc/grub.conf setting: title Red Hat Enterprise Linux Server (2.6.18-20.el5.kraxel.6xen) root (hd0,0) kernel /xen.gz-2.6.18-20.el5.kraxel.6 crashkernel=96M@32M module /vmlinuz-2.6.18-20.el5.kraxel.6xen ro \ root=/dev/VolGroup00/LogVol00 console=ttyS0,115200 crashkernel=96M@32M module /initrd-2.6.18-20.el5.kraxel.6xen.img Killed dom0 kernel with alt-sysrq-c, and kdump sequence successfully creates a vmcore. The vmcore, however, is not recognized as a xen dom0 kdump, and the crash utility therefore fails with a: crash: /vmlinux-2.6.18-20.el5.kraxel.6xen and vmcore do not match! message. This happens because the vmcore file does not contain the necessary xen Notes sections: # readelf -a vmcore ELF Header: Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, little endian Version: 1 (current) OS/ABI: UNIX - System V ABI Version: 0 Type: CORE (Core file) Machine: Intel 80386 Version: 0x1 Entry point address: 0x0 Start of program headers: 64 (bytes into file) Start of section headers: 0 (bytes into file) Flags: 0x0 Size of this header: 64 (bytes) Size of program headers: 56 (bytes) Number of program headers: 5 Size of section headers: 0 (bytes) Number of section headers: 0 Section header string table index: 0 There are no sections in this file. There are no sections in this file. Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align NOTE 0x0000000000000158 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0 LOAD 0x0000000000000158 0x00000000c0000000 0x0000000000000000 0x00000000000a0000 0x00000000000a0000 RWE 0 LOAD 0x00000000000a0158 0x00000000c0100000 0x0000000000100000 0x0000000001f00000 0x0000000001f00000 RWE 0 LOAD 0x0000000001fa0158 0x00000000c8000000 0x0000000008000000 0x0000000030000000 0x0000000030000000 RWE 0 LOAD 0x0000000031fa0158 0xffffffffffffffff 0x0000000038000000 0x0000000007ee0000 0x0000000007ee0000 RWE 0 There is no dynamic section in this file. There are no relocations in this file. There are no unwind sections in this file. No version information found in this file. # This appears to be an i386-only issue, because an example x86_64 xen dom0 kdump does contain the xen Notes. This is "readelf -a" of an x86_64 vmcore, which was copied from BZ #243880: ELF Header: Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 Class: ELF64 Data: 2's complement, little endian Version: 1 (current) OS/ABI: UNIX - System V ABI Version: 0 Type: CORE (Core file) Machine: Advanced Micro Devices X86-64 Version: 0x1 Entry point address: 0x0 Start of program headers: 64 (bytes into file) Start of section headers: 0 (bytes into file) Flags: 0x0 Size of this header: 64 (bytes) Size of program headers: 56 (bytes) Number of program headers: 7 Size of section headers: 0 (bytes) Number of section headers: 0 Section header string table index: 0 There are no sections in this file. There are no sections in this file. Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align NOTE 0x00000000000001c8 0x0000000000000000 0x0000000000000000 0x0000000000000380 0x0000000000000380 0 LOAD 0x0000000000000548 0xffff810000000000 0x0000000000000000 0x00000000000a0000 0x00000000000a0000 RWE 0 LOAD 0x00000000000a0548 0xffff810000100000 0x0000000000100000 0x0000000001f00000 0x0000000001f00000 RWE 0 LOAD 0x0000000001fa0548 0xffff810012000000 0x0000000012000000 0x000000006b5c6000 0x000000006b5c6000 RWE 0 LOAD 0x000000006d566548 0xffff81007d638000 0x000000007d638000 0x0000000000edb000 0x0000000000edb000 RWE 0 LOAD 0x000000006e441548 0xffff81007e51f000 0x000000007e51f000 0x0000000000090000 0x0000000000090000 RWE 0 LOAD 0x000000006e4d1548 0xffff81007e5ff000 0x000000007e5ff000 0x0000000000001000 0x0000000000001000 RWE 0 There is no dynamic section in this file. There are no relocations in this file. There are no unwind sections in this file. No version information found in this file. Notes at offset 0x000001c8 with length 0x00000380: Owner Data size Description CORE 0x00000150 NT_PRSTATUS (prstatus structure) Xen 0x00000020 Unknown note type: (0x01000002) Xen 0x00000048 Unknown note type: (0x01000001) CORE 0x00000150 NT_PRSTATUS (prstatus structure) Xen 0x00000020 Unknown note type: (0x01000002) The 5 Notes sections above are required. Note types 0x01000001 and 0x01000002 are XEN_ELFNOTE_CRASH_INFO and XEN_ELFNOTE_CRASH_REGS types, known to the kernel but not to readelf. In any case, they are not being created in the i386 vmcore. Version-Release number of selected component (if applicable): kernel-2.6.18-20.el5.kraxel.6 How reproducible: Always Steps to Reproduce: 1. Install and run kernel-2.6.18-20.el5.kraxel.6 dom0 kernel 2. Set-up kdump as shown above 3. crash dom0 kernel with alt-sysrq-c Actual Results: vmcore is created, but is missing the required xen Notes. Expected Results: The xen Notes should be part of the vmcore file. Additional info: