I'm trying to explore crash dumps under these conditions:
- VMware workstation 7.1.5 build-491717
- CentOS 5.7 +updates, as of today
- kernel 2.6.18-274.17.1.el5 x86
- crash 6.0.2
I've sucessfully enabled kdump to generate crash dumps, but the
'crash' utility can neither find the vmlinux image for the live
system, nor match the crash dump with the vmlinux image I direct
it to.
Misc RPMs installed:
[root@172-20-1-25 modules]# uname -r; rpm -qa | grep kernel
2.6.18-274.17.1.el5
kernel-2.6.18-274.17.1.el5
kernel-debug-2.6.18-274.17.1.el5
kernel-debuginfo-2.6.18-274.17.1.el5.centos.plus
kernel-debuginfo-common-2.6.18-274.17.1.el5.centos.plus
kernel-devel-2.6.18-274.17.1.el5
Here are various invocations I've attempted; can anyone suggest what's
causing these failures, and how to work around them?
Please let me know if there are any details I can provide to assist.
Additional notes:
- I've tries both crashkernel=64M@16M and crashkernel=128M@16M as
kernel arguments, with the same results.
- I've attempted a symlink to match the debug modules directly to
the name of the kernel, but that didn't change the results:
2.6.18-274.17.1.el5.centos.plus -> 2.6.18-274.17.1.el5
-------------------------------
Against the live system:
[root@172-20-1-25 modules]# crash
crash 6.0.2
[...]
crash: cannot find booted kernel -- please enter namelist argument
-------------------------------
Against the vmlinux file supplied by the kernel-debuginfo RPM:
[root@172-20-1-25 modules]# crash /usr/lib/debug/lib/modules/2.6.18-274.17.1.el5.centos.plus/vmlinux
crash 6.0.2
[...]
WARNING: /usr/lib/debug/lib/modules/2.6.18-274.17.1.el5.centos.plus/vmlinux
and /proc/version do not match!
WARNING: /proc/version indicates kernel version: 2.6.18-274.17.1.el5
crash: please use the vmlinux file for that kernel version, or try using
the System.map for that kernel version as an additional argument.
-------------------------------
Against my crash dump:
[root@172-20-1-25 modules]# crash /usr/lib/debug/lib/modules/2.6.18-274.17.1.el5.centos.plus/vmlinux /home/crash/127.0.0.1-2012-01-26-19\:19\:19/vmcore
crash 6.0.2
[...]
crash: cannot determine base kernel version
WARNING: cannot read linux_banner string
crash: /usr/lib/debug/lib/modules/2.6.18-274.17.1.el5.centos.plus/vmlinux and /home/crash/127.0.0.1-2012-01-26-19:19:19/vmcore do not match!
--
Brian Reichert <reichert@xxxxxxxxxxx>
BSD admin/developer at large
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