ksymoops 2.4.9 on i686 2.4.27-rc4.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.27-rc4/ (default)
     -m /usr/src/linux/System.map (default)

Warning: You did not tell me where to find symbol information.  I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc.  ksymoops -h explains the options.

kernel BUG at xfs_aops.c:1222!
invalid operand: 0000
CPU:    0
EIP:    0010:[<c01f96ed>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010297
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: 00000000
esi: ffff6000   edi: 00000000   ebp: ceee9e80   esp: ceee9dec
ds: 0018   es: 0018   ss: 0018
Process diotest4 (pid: 8690, stackpage=ceee9000)
Stack: cfeee87c 0000b000 00000000 ffff6000 00000021 ceee9e44 ceee9e40 00000002 
ceee9e80 cfefb580 ceee9e18 0000b000 00000000 ffff6000 ffff6000 00000000 
00000021 00002401 00000000 00000000 d40b8800 00000000 00000010 00000203 
Call Trace:    [<c012d294>] [<c012f800>] [<c01fd3f1>] [<c01f9ea0>] [<c01f980b>]
[<c013b70c>] [<c0108cf7>]
Code: 0f 0b c6 04 a9 b5 35 c0 e9 73 fd ff ff 8b 5d 90 83 0b 08 e9 


>>EIP; c01f96ed <linvfs_direct_IO+38d/400>   <=====

>>ebp; ceee9e80 <_end+ea8cea0/186f7080>
>>esp; ceee9dec <_end+ea8ce0c/186f7080>

Trace; c012d294 <generic_file_direct_IO+264/2c0>
Trace; c012f800 <do_generic_direct_read+40/60>
Trace; c01fd3f1 <xfs_read+151/2c0>
Trace; c01f9ea0 <linvfs_write+150/180>
Trace; c01f980b <linvfs_read+ab/c0>
Trace; c013b70c <sys_read+9c/130>
Trace; c0108cf7 <system_call+33/38>

Code;  c01f96ed <linvfs_direct_IO+38d/400>
00000000 <_EIP>:
Code;  c01f96ed <linvfs_direct_IO+38d/400>   <=====
   0:   0f 0b                     ud2a      <=====
Code;  c01f96ef <linvfs_direct_IO+38f/400>
   2:   c6 04 a9 b5               movb   $0xb5,(%ecx,%ebp,4)
Code;  c01f96f3 <linvfs_direct_IO+393/400>
   6:   35 c0 e9 73 fd            xor    $0xfd73e9c0,%eax
Code;  c01f96f8 <linvfs_direct_IO+398/400>
   b:   ff                        (bad)  
Code;  c01f96f9 <linvfs_direct_IO+399/400>
   c:   ff 8b 5d 90 83 0b         decl   0xb83905d(%ebx)
Code;  c01f96ff <linvfs_direct_IO+39f/400>
  12:   08 e9                     or     %ch,%cl

kernel BUG at xfs_aops.c:1222!
invalid operand: 0000
CPU:    0
EIP:    0010:[<c01f96ed>]    Not tainted
EFLAGS: 00010297
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: 00000000
esi: ffff5000   edi: 00000000   ebp: ceee9e80   esp: ceee9dec
ds: 0018   es: 0018   ss: 0018
Process diotest4 (pid: 8702, stackpage=ceee9000)
Stack: cfeeee5c 1000a000 00000000 ffff5000 00000021 ceee9e44 ceee9e40 00000002 
ceee9e80 d00e3440 ceee9e18 1000a000 00000000 ffff5000 ffff5000 00000000 
00000021 00002401 00000000 00000000 d40b8000 00000000 00000010 00000213 
Call Trace:    [<c012d294>] [<c012f800>] [<c01fd3f1>] [<c01f9ea0>] [<c01f980b>]
[<c013b70c>] [<c0108cf7>]
Code: 0f 0b c6 04 a9 b5 35 c0 e9 73 fd ff ff 8b 5d 90 83 0b 08 e9 


>>EIP; c01f96ed <linvfs_direct_IO+38d/400>   <=====

>>ebp; ceee9e80 <_end+ea8cea0/186f7080>
>>esp; ceee9dec <_end+ea8ce0c/186f7080>

Trace; c012d294 <generic_file_direct_IO+264/2c0>
Trace; c012f800 <do_generic_direct_read+40/60>
Trace; c01fd3f1 <xfs_read+151/2c0>
Trace; c01f9ea0 <linvfs_write+150/180>
Trace; c01f980b <linvfs_read+ab/c0>
Trace; c013b70c <sys_read+9c/130>
Trace; c0108cf7 <system_call+33/38>

Code;  c01f96ed <linvfs_direct_IO+38d/400>
00000000 <_EIP>:
Code;  c01f96ed <linvfs_direct_IO+38d/400>   <=====
   0:   0f 0b                     ud2a      <=====
Code;  c01f96ef <linvfs_direct_IO+38f/400>
   2:   c6 04 a9 b5               movb   $0xb5,(%ecx,%ebp,4)
Code;  c01f96f3 <linvfs_direct_IO+393/400>
   6:   35 c0 e9 73 fd            xor    $0xfd73e9c0,%eax
Code;  c01f96f8 <linvfs_direct_IO+398/400>
   b:   ff                        (bad)  
Code;  c01f96f9 <linvfs_direct_IO+399/400>
   c:   ff 8b 5d 90 83 0b         decl   0xb83905d(%ebx)
Code;  c01f96ff <linvfs_direct_IO+39f/400>
  12:   08 e9                     or     %ch,%cl


1 warning issued.  Results may not be reliable.