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

# pmap\_is\_prefaultable(9)

determine if a page may be prefaulted

## NAME

**pmap\_is\_prefaultable** – determine if a page may be prefaulted

## SYNOPSIS

**#include \<sys/param.h\>**

**#include \<vm/vm.h\>**

**#include \<vm/pmap.h\>**

*bool*\

**pmap\_is\_prefaultable**(*pmap\_t pmap*, *vm\_offset\_t va*);

## DESCRIPTION

The **pmap\_is\_prefaultable**() function provides a means of determining if the page residing at virtual address *va* in the physical map *pmap* may be pre-faulted into main memory.

This is a helper function which is called by [vm\_fault\_prefault(9)](/vm_fault_prefault/9.md).

## SEE ALSO

[pmap(9)](/pmap/9.md), [vm\_fault\_prefault(9)](/vm_fault_prefault/9.md)

## AUTHORS

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