In another thread beginning with:
http://marc.theaimsgroup.com/?l=linux-kernel&m=103388771007676&w=2
a problem is reported with loading ide-scsi modules. In addition to the
problems noted in loading those modules, I've noted problems removing the
modules since at least 2.5.38. Following is an example of the oops I get
when this happens. This doesn't lock up the kernel, but I do get a freeze
during a subsequent reboot which I've documented at
http://marc.theaimsgroup.com/?l=linux-kernel&m=103351991417181&w=2
Unable to handle kernel paging request at virtual address 5a5a5a62
printing eip:
c01a79ac
*pde = 00000000
Oops: 0000
sr_mod cdrom sg ide-scsi scsi_mod ymfpci soundcore ac97_codec parport_pc
lp parport rtc
CPU: 0
EIP: 0060:[<c01a79ac>] Not tainted
EFLAGS: 00010206
EIP is at devclass_remove_device+0xc/0x40
eax: 5a5a5a5a ebx: 5a5a5a5a ecx: d90ab268 edx: d7118820
esi: d7118820 edi: 00000000 ebp: d90ab268 esp: d5c3df50
ds: 0068 es: 0068 ss: 0068
Process rmmod (pid: 951, threadinfo=d5c3c000 task=d65026c0)
Stack: 5a5a5a5a d7118820 c01a6d16 d7118820 d7118820 d7118838 c01a6dce
d7118820
d90ab268 00000000 00000000 d5d0a000 c01a780b d90ab268 d90a8000
d90a8ff3
d90ab268 c01193de d90a8000 00000000 fffffff0 c01188b7 d90a8000
00000000
Call Trace:
[<c01a6d16>] device_detach+0x16/0x30
[<c01a6dce>] driver_detach+0x3e/0x60
[<d90ab268>] sr_template+0x48/0xa0 [sr_mod]
[<c01a780b>] __remove_driver+0xb/0x30
[<d90ab268>] sr_template+0x48/0xa0 [sr_mod]
[<d90a8ff3>] exit_sr+0x43/0x50 [sr_mod]
[<d90ab268>] sr_template+0x48/0xa0 [sr_mod]
[<c01193de>] free_module+0x1e/0xb0
[<c01188b7>] sys_delete_module+0xe7/0x1c0
[<c0108adf>] syscall_call+0x7/0xb
Code: 8b 58 08 85 db 74 1c 56 53 e8 96 01 00 00 56 53 e8 7f ff ff
Segmentation fault