Re: 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
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