An oops for your enjoyment

[Robert Norris]

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Hi all,

Got this oops recently:

Aug 11 13:31:15 broink kernel: Unable to handle kernel NULL pointer derefer=
ence at virtual address 00000410
Aug 11 13:31:15 broink kernel: current->tss.cr3 =3D 1f7e2000, %cr3 =3D 1f7e=
2000
Aug 11 13:31:15 broink kernel: *pde =3D 00000000
Aug 11 13:31:15 broink kernel: Oops: 0000
Aug 11 13:31:15 broink kernel: CPU:    1
Aug 11 13:31:15 broink kernel: EIP:    0010:[prune_dcache+194/312]
Aug 11 13:31:15 broink kernel: EFLAGS: 00010206
Aug 11 13:31:15 broink kernel: eax: 00000400   ebx: cc5dcf40   ecx: cf6e0f8=
0   edx: cf6e0328
Aug 11 13:31:15 broink kernel: esi: cf6e0380   edi: 00000000   ebp: fffffff=
f   esp: cc8edf0c
Aug 11 13:31:15 broink kernel: ds: 0018   es: 0018   ss: 0018
Aug 11 13:31:15 broink kernel: Process bonnie++ (pid: 1073, process nr: 13,=
 stackpage=3Dcc8ed000)
Aug 11 13:31:15 broink kernel: Stack: fffffffe cc3c6000 0805170e fffffff4 0=
0000000 ffffffff c8de6680 cc8edf78=20
Aug 11 13:31:15 broink kernel:        cc8ec000 c0135a07 0000363b ffffffff c=
c3c600d 00000206 cc5dcf40 d8fe5320=20
Aug 11 13:31:15 broink kernel:        fffffffe c0130b75 c8de6680 cc5dcf40 0=
0000000 c01313c6 cc5dcf40 00000003=20
Aug 11 13:31:15 broink kernel: Call Trace: [shrink_dcache_parent+23/48] [lo=
okup_dentry+365/504] [vfs_rmdir+254/308] [schedule+497/972] [sys_rmdir+201/=
320] [sys_unlink+204/236] [system_call+52/56]=20
Aug 11 13:31:15 broink kernel:        [startup_32+43/164]=20
Aug 11 13:31:15 broink kernel: Code: 8b 40 10 85 c0 74 09 83 c4 f4 56 ff d0=
 83 c4 10 8d 46 60 8b=20

I know very little about the kernel, so I was hoping someone could help
me to track down the problem.

Kernel version is 2.2.17pre16, with reiserfs-3.5.23 patch applied. Also
have the DAC960 driver installed (using a DAC1164P card).

bonnie++ was running at the time, on a reiserfs partition on top of a
RAID 0+1 set. After the oops happened, I was unable to use or unmount
the partition (a reboot was required).

I'm not bothered if noone can offer a solution, but I do need to know
which part of the kernel actually has a problem, and how likely it is
that this problem will be fixed (I'm evaluating this machine, so if
this is going to be a recurring problem I need to know now).

If you need any more information, please let me know.

Regards,
Rob.

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