More trapframe panics

[Jayachandran C.]

Hi Juli,

On Sun, Jan 26, 2014 at 3:36 AM, Juli Mallett <jmallett at freebsd.org> wrote:
>
>  This happens easily on 64-bit MIPS because due to slightly-crummy design
> on our part there's proportionally less room on the stack than on a 32-bit
> system.  Several people have nebulous plans to address the problem of the
> stack being too small, but I don't know of anyone intending concrete action
> going forward.

I had not seen the issue so far.

When I had done the pmap changes ealier, I had thought of adding the
option to use a higher order page for kernel stack and using the KSEG0
address as the stack pointer, instead of using the wired entry as we
do now.  Is there any reason this will not work.

JC.