NAME
pmap_page_exists_quick —
determine if a page exists in a
physical map
SYNOPSIS
#include
<sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
boolean_t
pmap_page_exists_quick(pmap_t
pmap, vm_page_t
m);
DESCRIPTION
Thepmap_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.
IMPLEMENTATION NOTES
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.
RETURN VALUES
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.
SEE ALSO
AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.