pmap_page_exists_quick(9)
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
- The pmap_page_exists_quick() function is used to quickly de
- termine 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 en
- try for the
physical map pmap is one of the first 16 PVs linked from the
- page m.
SEE ALSO
pmap(9)
AUTHORS
- This manual page was written by Bruce M Simpson
- <bms@spc.org>.
- BSD July 21, 2003