pmap_is_modified9
Return information about physical pages
Usage
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>
bool
pmap_is_modified(vm_page_t m);
int
pmap_ts_referenced(vm_page_t m);
Overview
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.
Releases
54 releases since FreeBSD 5.2-RELEASE; the text changed 34 times.