Block I/O + overflow :
---------------------
llm07:/home/murali/dtt_tools # ./ttutils set -p FS_DEVRW -t overflow -c 20

llm07:/proc # gdb /home/murali/linux-2.6.16/vmlinux-1M vmcore
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 "x86_64-suse-linux"...Using host libthread_db library "/lib64/tls/libthread_db.so.1".

#0  0xffffffff80251297 in crash_kexec (regs=0x0) at kexec.h:64
64      kexec.h: No such file or directory.
        in kexec.h
(gdb) info threads
* 1 process 10282  0xffffffff80251297 in crash_kexec (regs=0x0) at kexec.h:64
(gdb) bt
#0  0xffffffff80251297 in crash_kexec (regs=0x0) at kexec.h:64
#1  0xffffffff80231162 in panic (fmt=0xffffffff80533f8e "Aiee, killing interrupt handler!")
    at kernel/panic.c:89
#2  0xffffffff80234721 in do_exit (code=Variable "code" is not available.
) at kernel/exit.c:855
#3  0xffffffff80502ba1 in die_nmi (str=Variable "str" is not available.
) at arch/x86_64/kernel/traps.c:463
#4  0xffffffff8050303b in nmi_watchdog_tick (regs=Variable "regs" is not available.
) at arch/x86_64/kernel/nmi.c:495
#5  0xffffffff805029f6 in default_do_nmi (regs=Variable "regs" is not available.
) at arch/x86_64/kernel/traps.c:647
#6  0xffffffff80502f33 in do_nmi (regs=Variable "regs" is not available.
) at arch/x86_64/kernel/nmi.c:531
#7  0xffffffff805025c3 in nmi () at system.h:182
#8  0xffff810139113db8 in ?? ()
#9  0x0000000000000001 in ?? ()
#10 0xffff8100b786a150 in ?? ()
#11 0xffffffff80780800 in per_cpu__kstat ()
#12 0xffff810139113c88 in ?? ()
#13 0xffffffff80780800 in per_cpu__kstat ()
#14 0xffff8100053c81e0 in ?? ()
#15 0x0000000000000282 in ?? ()
#16 0x0000000000000046 in ?? ()
#17 0xffff8100053c81e0 in ?? ()
#18 0xffff8100c0023800 in ?? ()
#19 0x0000000000000010 in ?? ()
#20 0x0000000000000000 in ?? ()
#21 0x0000000000000001 in ?? ()
#22 0xffff8100c0023800 in ?? ()
#23 0xffffffffffffffff in ?? ()
#24 0xffffffff805020bd in .text.lock.spinlock () at sched.h:13
#25 0x0000000000000010 in ?? ()
#26 0x0000000000000082 in ?? ()
---Type <return> to continue, or q <return> to quit---
#27 0xffff810139113c00 in ?? ()
#28 0x0000000000000000 in ?? ()
#29 0x0000000000000000 in ?? ()
#30 0x0000000000000000 in ?? ()
#31 0x0000000000000000 in ?? ()
#32 0x0000000000000000 in ?? ()
#33 0x0000000000000000 in ?? ()
#34 0x0000000000000000 in ?? ()
#35 0x0000000000000000 in ?? ()
#36 0x0000000000000000 in ?? ()
#37 0x0000000000000000 in ?? ()
#38 0x0000000000000000 in ?? ()

---Type <return> to continue, or q <return> to quit---q
Quit
(gdb) info registers
rax            0x0      0
rbx            0xffff81013e2bac00       -139632638710784
rcx            0x0      0
rdx            0x246    582
rsi            0x246    582
rdi            0x0      0
rbp            0xffff81013cd20090       0xffff81013cd20090
rsp            0xffffffff806a7c88       0xffffffff806a7c88
r8             0x2      2
r9             0x0      0
r10            0x0      0
r11            0xffffffff806c50d8       -2140385064
r12            0xffffffff806a7f58       -2140504232
r13            0xb      11
r14            0x1      1
r15            0xffff810139113db8       -139632724329032
rip            0xffffffff80251297       0xffffffff80251297 <crash_kexec+185>
eflags         0x246    582
cs             0x10     16
ss             0x0      0
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0