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Alan Cox authored
vm_page_insert() so that (1) vm_radix_lookup_le() is never called while the free page queues lock is held and (2) vm_radix_lookup_le() is called at most once. This change reduces the average time that the free page queues lock is held by vm_page_alloc() as well as vm_page_alloc()'s average overall running time. Sponsored by: EMC / Isilon Storage Division
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