freebsd man page for tmpfs

TMPFS(5)						      BSD File Formats Manual							  TMPFS(5)

NAME
     tmpfs -- efficient 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

SEE ALSO
     nmount(2), unmount(2), fstab(5), mdmfs(8), mount(8)

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.

BSD
								  April 23, 2012							       BSD