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

Am Dienstag, 16. März 2004 20:24 schrieb Harald Schmalzbauer:
> Dear all,
>
> I have a very strange problem with my soekris net4501 (ElanSC520 embedded
> board).
> It ran fine over one year with 4.7 but since I upgraded it to -current from
> 2 days ago the box reboots every 60 minutes without any message.
> Does anybody know what this could cause?
>
> Attached my kernel and my rc.conf.
>
> -Manic Harry ?!?!?

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.
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