PMAP_IS_MODIFIED(9) BSD Kernel Developer's Manual PMAP_IS_MODIFIED(9)NAME
pmap_is_modified, pmap_ts_modified — return information about physical
pages
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
boolean_t
pmap_is_modified(vm_page_t m);
int
pmap_ts_referenced(vm_page_t m);
DESCRIPTION
The pmap_is_modified() and pmap_ts_referenced() functions return informa‐
tion about physical pages.
RETURN VALUES
The pmap_is_modified() function returns the status of the “page modified”
bit for the physical page m.
The pmap_ts_referenced() function returns a count of reference bits for a
page m, clearing those bits. It is not necessary for every reference bit
to be cleared, but it is necessary that 0 only be returned when there are
no remaining reference bits set on the page.
SEE ALSOpmap(9), pmap_clear_modify(9), pmap_clear_reference(9)AUTHORS
This manual page was written by Bruce M Simpson ⟨bms@spc.org⟩.
BSD July 21, 2003 BSD
