Red Hat Bugzilla – Bug 439767
[5.2][kdump] crash failed to read vmcore from SGI Altix
Last modified: 2008-05-21 11:23:32 EDT
Description of problem:
crash returned error when reading vmcore generated by kexec-tools-1.102pre-16.el5,
[root@altix4 SOURCES] crash /usr/lib/debug/lib/modules/2.6.18-86.el5/vmlinux
crash: read error: kernel virtual address: a000000100cc9f00 type: "xtime"
However, there is no such problem if using RHEL5U1 version
Version-Release number of selected component (if applicable):
Always (can try altix4.rhts.boston.redhat.com)
Steps to Reproduce:
1. configure kdump with crashkernel=512M@256M.
3. use crash to exam vmcore.
Looks like a known bug from upstream,
I have verified the following backport patch for kexec-tools-1.102pre-16.el5
fixed the problem, and crash read it correctly.
DATE: Mon Mar 31 06:03:26 2008
LOAD AVERAGE: 0.37, 0.17, 0.09
VERSION: #1 SMP Tue Mar 18 18:21:07 EDT 2008
MACHINE: ia64 (1500 Mhz)
MEMORY: 7.1 GB
PANIC: "SysRq : Trigger a crashdump"
TASK: e0000030f0fd0000 [THREAD_INFO: e0000030f0fd1040]
STATE: TASK_RUNNING (SYSRQ)
Created attachment 299695 [details]
Ok, requesting exception (not sure if this will make it though, as I can't
recall what the last snapshot date is)
This is a regression against RHEL5U1, so propose for RHEL5U2 rc-blocker.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.