On Tue, Dec 02, 1997 at 11:37:32AM -0800, Matthew P. Jacob wrote:
> 
> -current sources as of Nov 30:
> 
>  panic: pmap_page_protect !PG_V: ctx 0, va 0xf0173000, pte 0x0
> Stopped at      _Debugger+0x4:  jmpl            [%o7 + 0x8], %g0
> Frame pointer is at 0xf18e6c00

This may be the same swap/MFS problem that can be seen on the i386
resulting in "pmap_changebit" crashed due to a zero PTE, when called
from the pageout daemon. See PR port-i386/4281, it was also noticed
by some other people recently.

I have been able to reproduce it once, using MFS too. Of course, when
I installed a new kernel with more debug info, it did not crash no
matter what I did..

- Frank