 - Use an int rather than a vm_pindex_t to represent the desired page    color in vm_page_alloc().  (This also has small performance benefits.)  - Eliminate vm_page_select_free(); vm_page_alloc() might as well    call vm_pageq_find() directly.
 - Use an int rather than a vm_pindex_t to represent the desired page
   color in vm_page_alloc().  (This also has small performance benefits.)
 - Eliminate vm_page_select_free(); vm_page_alloc() might as well
   call vm_pageq_find() directly.

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