On Sun, 25 Jan 1998, Anders Magnusson wrote:

> Yes, that is due to my optimisations in the pmap code. The problem seems
> to be that if pmap_clear_reference() is set to unmap all pages (recommended
> in a mach paper) and a page that is set up to be swapped get unmapped
> this will happen. I have a fix for this on-the-way.

Great!  Until then, swapping over NFS is a slow, but feasible
workaround.  (Swapping to a local file gives the same crash.)

-tih
-- 
Popularity is the hallmark of mediocrity.  --Niles Crane, "Frasier"