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TMPFS(5)
TMPFS(5) FreeBSD File Formats Manual TMPFS(5)

NAME

tmpfsefficient memory file system

SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:

options TMPFS

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

tmpfs_load="YES"

DESCRIPTION

The tmpfs driver will permit the FreeBSD kernel to access tmpfs file systems.

OPTIONS

The following options are available when mounting tmpfs file systems:
gid
Specifies the group ID of the root inode of the file system. Defaults to the mount point's GID.
uid
Specifies the user ID of the root inode of the file system. Defaults to the mount point's UID.
mode
Specifies the mode (in octal notation) of the root inode of the file system. Defaults to the mount point's mode.
inodes
Specifies the maximum number of nodes available to the file system. If not specified, the file system chooses a reasonable maximum based on the file system size, which can be limited with the size option.
size
Specifies the total file system size in bytes. If zero (the default) or a value larger than SIZE_MAX - PAGE_SIZE is given, the available amount of memory (including main memory and swap space) will be used.
maxfilesize
Specifies the maximum file size in bytes. Defaults to the maximum possible value.

EXAMPLES

To mount a tmpfs memory file system:

mount -t tmpfs tmpfs /tmp

HISTORY

The tmpfs driver first appeared in FreeBSD 7.0.

AUTHORS

The tmpfs kernel implementation was written by Julio M. Merino Vidal <jmmv@NetBSD.org> as a Google SoC project.

Rohit Jalan and others ported it from NetBSD to FreeBSD.

This manual page was written by Xin LI <delphij@FreeBSD.org>.

BUGS

Some file system mount time options may not be well-supported.
April 23, 2012 FreeBSD