IPv6 panic [Was: panic/trace swi8: tty:sio clock [Was: Re: Mysterious 60min reboot on net4501]]

Am Mittwoch, 17. März 2004 15:08 schrieb Harald Schmalzbauer:
> Am Dienstag, 16. März 2004 20:24 schrieb Harald Schmalzbauer:
> > Dear all,
*SNIP*
> Dear developers,
>
> I didn't know that the comBIOS of this device clears the screen after
> rebooting so I couldn't see the panic message on the serial console before.
> Now I have it and a trace. Since this machine has very limited "disk"-space
> (in fact CompactFlash) I compiled a ddb kernel and the db> is now awaiting
> more input.

Bernd Walter told me that the following panic could be the IPv6 neighbourhood 
detection, so I removed INET6 from the kernel and now the 60min reboot 
doesn't occur anymore.
I haven't assigned any IPv6 address while Berd had, and only I have the panic 
so it seems to happen only if one has unconfigured IPv6 interfaces.

Hope this helps, find attached my kernel conf.

-Harry

> The following panic occurs exactly every 60 mins and ~15-20 sec.:
>
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x8
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc0584916
> stack pointer           = 0x10:0xc5eb4ccc
> frame pointer           = 0x10:0xc5eb4cd8
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 27 (swi8: tty:sio clock)
> kernel: type 12 trap, code=0
> Stopped at      nd6_slowtimo+0x66:      movl    0x8(%eax),%ebx
> db> trace
> nd6_slowtimo(0) at nd6_slowtimo+0x66
> softclock(0) at softclock+0x186
> ithread_loop(c0996580,c5eb4d48,c0996580,c04a63c0,0) at ithread_loop+0x144
> fork_exit(c04a63c0,c0996580,c5eb4d48) at fork_exit+0xb8
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0x1, eip = 0, esp = 0xc5eb4d7c, ebp = 0 ---
> db>
>
> Let me know if I can give you more info.
>
> -Harry