Fatal trap 12: page fault while in kernel mode/current process: 12 (swi2: cambio)

[O. Hartmann]

On 03/15/10 18:30, Matthew Fleming wrote:
>> Since the last update and make world on Friday, 12th March I get a
> crash
>> on one of my FreeBSD SMP boxes (it is always the same core message),
>> saying something about
>>
>> Fatal trap 12: page fault while in kernel mode [...] current process:
> 12
>> (swi2: cambio)
>
> Can you show the stack traceback from the kernel core?
>
> We had a problem a while ago at Isilon that I can't tell if it's
> related.  In our case, the camisr() routine was called after panic(9)
> started and before the halt of other processors.  This did Bad
> Things(TM) since the mtx_lock is a no-op after panicstr is set.
>
> We solved it locally by wrapping camisr() in a local cambio_swi()
> routine that only called camisr(NULL) when panicstr == NULL.
>
> Thanks,
> matthew

Hello.

I will do as soon as possible. The box is in production at the moment 
and I've less time to put everything into debugging to provide more details.

Just in case: does the kernel automatically save the screen with the 
dump information? If not, I have no other terminal facility to get a 
dump via the classical way.

Regards,
Oliver