pmap_page_exists_quick - determine if a page exists in a physical map
Synopsis Description Implementation Notes Return Values See Also Authors
.In sys/param.h .In vm/vm.h .In vm/pmap.h boolean_t pmap_page_exists_quick "pmap_t pmap" "vm_page_t m"
The pmap_page_exists_quick function is used to quickly determine if the page m exists in the physical map pmap. It is typically called from the VM paging code.
The PV count used above may be changed upwards or downwards in future; it is only necessary that TRUE be returned for a small subset of pmaps for proper page aging.
The pmap_page_exists_quick returns TRUE only if the PV entry for the physical map pmap is one of the first 16 PVs linked from the page m.