FreeBSD-6.2, SMP, coredump -- fatal trap 12 : page fault while in kernel mode, current process: (swi1:net)

[Kris Kennaway]

On Wed, Jun 13, 2007 at 07:26:51PM -0700, Yong Rao wrote:
> Hello,
> 
>  
> 
> Recently, in developing our driver, we found the core dump did not work
> on the FBSD OS 6.2. It hung at the beginning of core dump when crash
> happened. 

This can happen when the panic involves the storage subsystem, or if
something else is performing I/O (i.e. holding a relevant lock) at the
time of panic.  Online debugging using ddb helps a lot.

Kris