K 10
svn:author
V 8
jchandra
K 8
svn:date
V 27
2010-08-06T07:32:33.560640Z
K 7
svn:log
V 611
Fix the issue reported by alc:

 pmap_page_wired_mappings() counts the number of pv entries for the
 specified page that have the pv entry wired flag set to TRUE.
 pmap_enter() correctly initializes this flag.  However,
 pmap_change_wiring() doesn't update the corresponding pv entry flag,
 only the PTE.  So, the count returned by pmap_page_wired_mappings()
 will sometimes be wrong.

 In the short term, the best fix would be to eliminate the pv entry
 flag and use only the PTE.  That flag is wasting non-trivial memory.

Remove pv_wired flag, and use PTE flag to count the wired mappings.

Reviewed by:	alc

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