Summary:
--------

GDB output:

elm3b157:/home/hbabu/2616-rc1-k1 # gdb ./vmlinux /home/hbabu/vmcore.1
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This GDB was configured as "ppc64-suse-linux"...Using host libthread_db
library "/lib64/libthread_db.so.1".

#0  0xc0000000000845c0 in crash_kexec (regs=0x0) at kexec.h:49
49                      __asm__ __volatile__ (
(gdb) bt
#0  0xc0000000000845c0 in crash_kexec (regs=0x0) at kexec.h:49
#1  0xc000000000232a24 in sysrq_handle_crashdump (key=<value optimized out>,
   pt_regs=0x0, tty=0x0) at sysrq.c:103
#2  0xc000000000232b58 in __handle_sysrq (key=99, pt_regs=0x0, tty=0x0,
   check_mask=0) at sysrq.c:410
#3  0xc0000000001169fc in write_sysrq_trigger (file=<value optimized out>,
   buf=0xf7e83000 <Address 0xf7e83000 out of bounds>, count=2,
   ppos=<value optimized out>) at proc_misc.c:688
#4  0xc0000000000c1574 in vfs_write (file=0xc0000000e553fb20,
   buf=0xf7e83000 <Address 0xf7e83000 out of bounds>, count=0,
   pos=0xc0000000e3c97e08) at read_write.c:316
#5  0xc0000000000c1cdc in sys_write (fd=<value optimized out>, buf=0x0,
   count=0) at read_write.c:369
#6  0xc0000000000086f8 in system_call ()
#7  0xc0000000000086f8 in system_call ()
Previous frame identical to this frame (corrupt stack?)