---
name: "gethugepagesize"
section: "3"
platform: "linux"
package: "libhugetlbfs-dev"
version: "2.24-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/gethugepagesize"
---

# gethugepagesize(3)

Get the default huge page size

## NAME

gethugepagesize - Get the default huge page size

## SYNOPSIS

**#include \<hugetlbfs.h\>**\

**long gethugepagesize(void)**

## DESCRIPTION

The gethugepagesize() function returns the default huge page size used by libhugetlbfs.  This will be either the system default, or a valid value set by the environment variable **HUGETLB\_DEFAULT\_PAGE\_SIZE**.

If the system does not support any huge page sizes an error is returned.

## RETURN VALUE

On success, the default huge page size is returned.  On failure, -1 is returned and errno is set appropriately.

## ERRORS

- **ENOSYS**

  The system does not support huge pages.

## SEE ALSO

*[libhugetlbfs(7)](/libhugetlbfs/7.md)*

## AUTHORS

libhugetlbfs was written by various people on the libhugetlbfs-devel mailing list.