Re: [Crash-utility] Problem opening core file.

Rohit Persai wrote: > Greetings, > > I am trying to open a core file but getting following error. I am > sure that I am using right kernel + kernel-debuginfo package. As > following command on crash log shows version on kernel in use. > # cat crash-log | grep -i 2.4.21 > EIP is at check_pgt_cache [kernel] 0x19 (2.4.21-47.ELsmp) > > ----------------------------------------snip-from-system-on-which-i-am-opening-core-file----------------------------------------- > > # uname -r > 2.4.21-47.ELsmp > > # crash /usr/lib/debug/boot/vmlinux-2.4.21-47.ELsmp.debug > /boot/vmlinux-2.4.21-47.ELsmp case_1843132_vmcore > > crash 4.0-6.3 > Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Red Hat, Inc. > Copyright (C) 2004, 2005, 2006 IBM Corporation > Copyright (C) 1999-2006 Hewlett-Packard Co > Copyright (C) 2005, 2006 Fujitsu Limited > Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. > Copyright (C) 2005 NEC Corporation > Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. > Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. > This program is free software, covered by the GNU General Public > License, > and you are welcome to change it and/or distribute copies of it under > certain conditions. Enter "help copying" to see the conditions. > This program has absolutely no warranty. Enter "help warranty" for > details. > > GNU gdb 6.1 > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and > you are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for > details. > This GDB was configured as "i686-pc-linux-gnu"... > > WARNING: invalid value: smp_num_cpus: -1070037996 > crash: /usr/lib/debug/boot/vmlinux-2.4.21-47.ELsmp.debug and > case_1843132_vmcore do not match! > > Usage: > crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] > [dumpfile] > > Enter "crash -h" for details. > ----------------------------------------snip-from-system-on-which-i-am-opening-core-file----------------------------------------- > > > Question: Why am I getting following message if I am using right set > of packages. > crash: /usr/lib/debug/boot/vmlinux-2.4.21-47.ELsmp.debug and > case_1843132_vmcore do not match! > > Any help would be greatly appreciated. > Rohit. Sorry for the delay -- I'm back from a 2-week break... Perhaps you've already resolved this issue, but if not, it does appear that you're doing everything correctly. But when the value for "smp_num_cpus" was read from the vmcore, it's reading an integer value of -1070037996 (c0388414). Since that's clearly nonsensical, it makes no sense continuing. Since RHEL3 used that brain-dead split vmlinux/vmlinux.debug format, you'd get a "CRC value does not match" error message if those two files weren't in sync. And if the host machine and the vmlinux/vmlinux.debug/vmcore triplet weren't the same architecture, you'd get a "machine type mismatch" error message. The only other thing I can suggest is to do this: # strings /boot/vmlinux-2.4.21-47.ELsmp | grep "Linux version" ... # strings case_1843132_vmcore | grep "Linux version" ... and make sure the strings match exactly -- including the build dates. It would be easy to say "it must be a corrupt vmcore", so I won't. But's about as much help as I can come up with. Dave -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility