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 information 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 ALSO¶

pmap(9), pmap_clear_modify(9)

AUTHORS¶

This manual page was written by Bruce M Simpson <bms@spc.org>.