Hi Andrew,

I just saw following Oops in my Kernel messages. I didn'd have this with -mm3.

NET: Registered protocol family 10
Unable to handle kernel paging request at virtual address 000927c0
 printing eip:
c012ba17
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
CPU:    0
EIP:    0060:[<c012ba17>]    Not tainted VLI
EFLAGS: 00010246
EIP is at register_proc_table+0x47/0x120
eax: 00000000   ebx: e106c9ec   ecx: ffffffff   edx: 000927c0
esi: 00000000   edi: 000927c0   ebp: c012b130   esp: de4ddd7c
ds: 007b   es: 007b   ss: 0068
Process modprobe (pid: 1936, threadinfo=de4dc000 task=de9e3900)
Stack: e1061159 000081a4 de6e5c40 81a40000 de6e5c40 e106d480 00000000 de6e5c40
       00000000 c012ba7c e10617fc 0000416d de6e5cc0 416d0000 de6e5cc0 e106d640
       00000000 de6e5cc0 00000000 c012ba7c e1061862 0000416d dffccac0 416dddec
Call Trace:
 [<c012ba7c>] register_proc_table+0xac/0x120
 [<c012ba7c>] register_proc_table+0xac/0x120
 [<c012ba7c>] register_proc_table+0xac/0x120
 [<c012bb4e>] register_sysctl_table+0x5e/0x80
 [<e105d347>] ipv6_sysctl_register+0x17/0x20 [ipv6]
 [<e0e9018b>] inet6_init+0x18b/0x2d0 [ipv6]
 [<c013b62b>] sys_init_module+0x17b/0x1670
 [<c0152cd6>] vma_link+0x76/0xc0
 [<c015423c>] do_mmap_pgoff+0x38c/0x6f9
 [<c015e109>] filp_close+0x59/0xa0
 [<c015e1ab>] sys_close+0x5b/0xa0
 [<c02df843>] syscall_call+0x7/0xb

Code: 33 85 f6 0f 84 9b 00 00 00 8b 53 04 85 d2 89 d7 74 ea 8b 73 18 85 f6 75 
0b 8b 43 14 85 c0 0f 84 cb 00 00 00 31 c0 b9 ff ff ff ff <f2> a
e f7 d1 49 85 f6 0f b7 43 10 89 cd 66 89 44 24 0e 74 6d 66
 <7>request_module: failed /sbin/modprobe -- net-pf-10. error = 11

If this is not enough information to track down the problem I can provide 
my .config of any other information, of course.

Best regards
   Thomas Schlichter