Hello,

I have this issue with compressed RHEL5 vmcore files, I can't get it to loaded to the crash utility. I don't have this problem with RHEL4 vmcores (diskdump).
The debuginfo kernel exactly matches the kernel version that generated the vmcore


[root@test-fc12 ~]# crash *usr/lib/debug/lib/modules/2.6.18-92.1.10.el5debug/vmlinux /nas01/cores/2.6.18-92.1.10.el5.vmcore


crash 4.0.9-2.fc12
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Copyright (C) 2005 *NEC Corporation
Copyright (C) 1999, 2002, 2007 *Silicon Graphics, Inc.
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This GDB was configured as "x86_64-unknown-linux-gnu"...


crash: page excluded: kernel virtual address: ffffffff804f1260 *type: "possible"
WARNING: cannot read cpu_possible_map

crash: usr/lib/debug/lib/modules/2.6.18-92.1.10.el5debug/vmlinux and /nas01/cores/2.6.18-92.1.10.el5.vmcore do not match!

Usage:

*crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] [dumpfile]

Enter "crash -h" for details.


[root@test-fc12 ~]# strings usr/lib/debug/lib/modules/2.6.18-92.1.10.el5debug/vmlinux | grep 2.6 | head -2

Linux
version 2.6.18-92.1.10.el5debug
(brewbuilder@ls20-bc2-13.build.redhat.com) (gcc version 4.1.2 20071124
(Red Hat 4.1.2-42)) #1 SMP Wed Jul 23 04:27:38 EDT 2008
2.6.18-92.1.10.el5debug SMP mod_unload gcc-4.1

running strings on the rhel5 vmcore file:


[root@test-fc12 cores]# strings 2.6.18-92.1.10.el5.vmcore | grep 2.6 | head -2
2X6
2T6(

does makedumpconfig's compression have something to do with this? from kdump.conf on the machine where i got that vmcore:


...
core_collector makedumpfile -c -d31
...

Thank you in advace!


Regards,
Marc

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