> 
> After upgrading my KA650 to -current as of 1998-01-21 (from 1.3_BETA),
> my swap partition is suddenly unusable.  It shows up in the output
> from 'swapctl -l', but as soon as the system tries to actually swap
> to it, it's panic time, with an "illegal DMA" message.
> 
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.

-- Ragge