Norbert Wegener wrote:
> Mar  5 12:48:15 nobbi kernel: ip_conntrack version 2.4 (3583 buckets,
> 28664 max) - 232 bytes per conntrack
> Mar  5 12:48:44 nobbi kernel: BUG: soft lockup detected on CPU#0!
> Mar  5 12:48:44 nobbi kernel:
> Mar  5 12:48:44 nobbi kernel: Pid: 12848, comm:                rmmod
> Mar  5 12:48:44 nobbi kernel: EIP: 0060:[<c011b230>] CPU: 0
> Mar  5 12:48:44 nobbi kernel: EIP is at local_bh_enable+0x1/0x5c
> Mar  5 12:48:44 nobbi kernel:  EFLAGS: 00000202    Not tainted 
> (2.6.15.1-default)
> Mar  5 12:48:44 nobbi kernel: EAX: 00000000 EBX: cdcabb10 ECX: c35dbf4c
> EDX: cdcabb10
> Mar  5 12:48:44 nobbi kernel: ESI: c35dbf4c EDI: 00000000 EBP: dd243db0
> DS: 007b ES: 007b
> Mar  5 12:48:44 nobbi kernel: CR0: 8005003b CR2: 0805e30c CR3: 059d5000
> CR4: 000006d0
> Mar  5 12:48:44 nobbi kernel:  [<dd243c54>] get_next_corpse+0xc7/0xce
> [ip_conntrack]
> Mar  5 12:48:44 nobbi kernel:  [<dd243db0>] kill_all+0x0/0x6 [ip_conntrack]
> Mar  5 12:48:44 nobbi kernel:  [<dd243cb5>]
> ip_ct_iterate_cleanup+0x5a/0x66 [ip_conntrack]
> Mar  5 12:48:44 nobbi kernel:  [<dd243dea>]
> ip_conntrack_cleanup+0x14/0x65 [ip_conntrack]
> Mar  5 12:48:45 nobbi kernel:  [<dd2427e9>] init_or_cleanup+0x24b/0x24f
> [ip_conntrack]
> Mar  5 12:48:45 nobbi kernel:  [<c0129642>] sys_delete_module+0x11f/0x14f
> Mar  5 12:48:45 nobbi kernel:  [<c0140905>] do_munmap+0xd2/0xe8
> Mar  5 12:48:45 nobbi kernel:  [<c01029db>] sysenter_past_esp+0x54/0x79

Can you reproduce the problem (by rmmod'ing ip_conntrack)? If so please
try if this patch helps.