[root@kvm7 127.0.0.1-2014-02-07-19:17:09]# crash /boot/System.map-2.6.32-220.el6.x86_64.debug /usr/lib/debug/lib/modules/2.6.32-220.el6.x86_64.debug/vmlinux vmcore crash 5.1.8-1.el6 Copyright (C) 2002-2011 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 (GDB) 7.0 Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later < http://gnu.org/licenses/gpl.html > This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... crash: page excluded: kernel virtual address: ffffffff81542000 type: "cpu_possible_mask" I can go into minimal, nm -Bn /usr/lib/debug/lib/modules/2.6.32-220.el6.x86_64.debug/vmlinux | grep _stext ffffffff81000198 T _stext cat /proc/kallsyms | grep _stext ffffffff81000198 T _stext If I use the System Map parm I get this warning WARNING: kernels compiled by different gcc versions: /usr/lib/debug/lib/modules/2.6.32-220.el6.x86_64.debug/vmlinux: 4.4.5 vmcore kernel: 4.4.6 Would really like to understand why this system crashed. I know I'm a bit behind on my kernel versions however, but I should be able to look at this kernel?? Thanks Tory