The calls to vm_radix_lookup_ge() by vm_reserv_alloc_{contig,page}() can be eliminated.  If the calls to vm_radix_lookup_le() return NULL, then the page at the head of the object's memq must be the page with the least pindex greater than the specified pindex.
The calls to vm_radix_lookup_ge() by vm_reserv_alloc_{contig,page}() can
be eliminated.  If the calls to vm_radix_lookup_le() return NULL, then
the page at the head of the object's memq must be the page with the least
pindex greater than the specified pindex.

Reviewed by:	attilio
Sponsored by:	EMC / Isilon Storage Division

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