testing yamt-x86pmap branch

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

i'm going to merge yamt-x86pmap branch soon.
(hopefully before someone notices that it's a good time to apply
cosmetic changes to these pmaps. :-)

if you have x86 machines, please test it.

thanks.

YAMAMOTO Takashi