| I think there is still a problem with the handling of mod/ref in your
 | new pmap.  Please take a look at the following patch.  This is how I
 | think it should work.
 | 
 | If you agree, I'll go ahead and commit the patch.

Please. It seems that I misunderstood about copy-on-write page treatment..
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UCHIYAMA Yasushi
uch@vnop.net