> Since building a 1.5E kernel, whenever I do a major
> compile the system eventually panics with the above
> message (on a VS4000/90A).
> 
This means that there is a page fault for a page that is already mapped;
i.e. something do not work as it should.

The pmap routines are the same in 1.5_ALPHA and I have been compiling
the system for about a week now without that error. 

As soon as I am satisfied with the 1.5 release then I will jump into 
-current and continue to improve it.

-- Ragge