My /dev/md0 is created in 2.4.18 and accessible in 2.4.19, 2.4.20,
2.5.58 to 2.5.62.

As upgraded to 2.5.63, after mounting /dev/md0 to /mnt/md0, then cd
/mnt/md0, it Oops.

Finally, I re-mkraid /dev/md0, then e2fsck /dev/md0, then it Oops again
with the following details:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Oops: 0000
CPU:	0
EIP:	0060:[<00000000>]	Not tainted
EFLAGS: 00010046
eax: 00000000	ebx: dfbc88bc	ecx: dfbc89e0	edx: dfee8720
esi: dfee8720	edi: dfbc8994	ebp: dfe88000	esp: dfe89f4c
ds: 007b	es: 007b	ss: 0068
Process events/0 (pid: 3, threadinfo=dfe88000 task=dfe8cc40)
Stack: 	c02fe847 dfbc88bc dfbc8998 c0130983 dfbc88bc dfee8724 dfe88000
dfbc88bc
	c02fe850 dfee8724 dfee8720 dfe8ffa8 dfee872c c01305f8 dfee8720
dfe89fa0
	00000000 00000000 dfe88000 dfe88000 dfe88000 00000001 00000000
c011e770
Call Trace: [<c02fe847>] [<c0130983>] [<c02fe850>] [<c01305f8>]
[<c011e770>] [<c010b24e>] [<c011e770>] [<c0130430>] [<c0108ff9>]
Code: Bad EIP value.
 <6>note: events/0[3] exited with preempt_count 1
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++

My .config is attached as config-2.5.63.

Regards,
Sampson Fung
A New Comer to Kernel Testing.