Hi Dave, I have another vmcore that gdb (6.4) was able to display bt but crash failed to come up. This copy of crash contains the changes you suggested on my previous failure report (10/26). I am not sure if this was caused by the fault of this vmcore, since gdb only showed one thread. There should be another thread. But i think i should let you know and let you decide if this is the case. Thanks, - jay ### # gdb vmlinux vmcore-nmi-10 GNU gdb 6.4 Copyright 2005 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 "ia64-suse-linux"...Using host libthread_db library "/lib/libthread_db.so.1". #0 crash_save_this_cpu () at arch/ia64/kernel/crash.c:57 warning: Source file is more recent than executable. 57 memcpy(buf, name, note->n_namesz); (gdb) bt #0 crash_save_this_cpu () at arch/ia64/kernel/crash.c:57 #1 0xa00000010005f580 in kdump_cpu_freeze (info=<value optimized out>, arg=0x1) at arch/ia64/kernel/crash.c:166 #2 0xa00000010000c9f0 in unw_init_running () at include/linux/bitmap.h:237 #3 0xa00000010005ef70 in kdump_init_notifier (self=0xa000000100b47d78, val=<value optimized out>, data=0xe000003007157b70) at arch/ia64/kernel/crash.c:217 #4 0xa0000001000cf0d0 in notifier_call_chain (nl=0xe000003014bcb3f8, val=13, v=0xe000003007157b70) at kernel/sys.c:144 #5 0xa0000001000cf170 in atomic_notifier_call_chain (nh=0xe000003014bcb3f0, val=21, v=0xe000003007157b70) at kernel/sys.c:229 #6 0xa000000100048480 in ia64_init_handler (regs=0xe000003007157e40, sw=<value optimized out>, sos=<value optimized out>) at include/asm/kdebug.h:88 #7 0xa0000001000493a0 in ia64_os_init_virtual_begin () at include/asm/kdebug.h:88 (gdb) ### # crsah vmlinux vmcore-nmi-10 CORRECT>crash vmlinux vmcore-nmi-10 (y|n|e|a)? no crsah: Command not found. (jackhammer,113) crash vmlinux vmcore-nmi-10 crash 4.0-3.5 Copyright (C) 2002, 2003, 2004, 2005, 2006 Red Hat, Inc. Copyright (C) 2004, 2005, 2006 IBM Corporation 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 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. crash(1203): unaligned access to 0x60000000001bf1cc, ip=0x400000000026d090 crash(1203): unaligned access to 0x60000000001bf1d4, ip=0x400000000026d090 crash(1203): unaligned access to 0x60000000001bf1dc, ip=0x400000000026d090 crash(1203): unaligned access to 0x60000000001bf1e4, ip=0x400000000026d090 crash(1203): unaligned access to 0x60000000001bf1ec, ip=0x400000000026d090 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 "ia64-unknown-linux-gnu"... crash: invalid (optional) structure member offsets: pglist_data_node_next or pglist_data_pgdat_next FILE: memory.c LINE: 11504 FUNCTION: node_table_init() [/usr/people/jlan/bin/crash] error trace: => 4000000000231740 4000000000231740: OFFSET_option+432 WARNING: Because this kernel was compiled with gcc version 4.1.0, certain commands or command options may fail unless crash is invoked with the "--readnow" command line option. #