---
name: "pmap_ts_referenced"
section: "9"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/pmap_is_modified"
---

# pmap\_ts\_referenced(9)

return information about physical pages

Part of [pmap\_is\_modified(9)](/pmap_is_modified/9.md).

## 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\>**

*bool*\

**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/9.md), [pmap\_clear\_modify(9)](/pmap_clear_modify/9.md)

## AUTHORS

This manual page was written by Bruce M Simpson ⟨*bms@spc.org*⟩.