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PMAP_IS_MODIFIED(9) FreeBSD 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
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>.
FreeBSD 14.0-RELEASE-p6 July 17, 2014 FreeBSD 14.0-RELEASE-p6