[Crash-utility] Need help to get crash to work on kdump geneated vmcore

[Sampathkumar, Kishore (STSD)]

Hi,
 
I have been working on back-porting kexec/kdump functionality from
2.6.13 vanilla kernel to RHEL4, Update 2 kernel (version 2.6.9-22).
 
As part of that, when I try to invoke "crash" on a vmcore generated, I
get the following error in "crash" tool:
 
[root crash-4.0-2.23]# ./crash /boot/System.map-2.6.9-kdump-1
/usr/src/redhat/BUILD/kernel-2.6.9-kdump-1/linux- 2.6.9/vmlinux
/root/vmcore
 
crash 4.0-2.23
Copyright (C) 2002, 2003, 2004, 2005, 2006  Red Hat, Inc.
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Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005  Fujitsu Limited
Copyright (C) 2005  NEC Corporation
Copyright (C) 1999, 2002  Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public
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This program has absolutely no warranty.  Enter "help warranty" for
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GNU gdb 6.1
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
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There is absolutely no warranty for GDB.  Type "show warranty" for
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This GDB was configured as "x86_64-unknown-linux-gnu"...
 
crash: read error: kernel virtual address: ffffffff813a8200  type:
"xtime"
[root crash-4.0-2.23]# 
[root crash-4.0-2.23]# 
 
I tried with both crash-4.0-2.15 as well as crash-4.0-2.23. Same result.
- Should I be re-building crash as part of the back-port?
- Is crash capable of handing vmcore's generated by kdump?
- Can someone suggest how I can make progress to get crash to work for
this?
 
Thanks,
- Kishore
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