NAME<\/a> tmpfs \u2212 a virtual memory filesystem<\/p>\n The tmpfs<\/b> facility allows the creation of filesystems whose contents reside in virtual memory. Since the files on such filesystems typically reside in RAM, file access is extremely fast.<\/p>\n The filesystem is automatically created when mounting a filesystem with the type tmpfs<\/b> via a command such as the following:<\/p>\n $ sudo mount \u2212t tmpfs \u2212o size=10M tmpfs \/mnt\/mytmpfs<\/p>\n A tmpfs<\/b> filesystem has the following properties:<\/p>\n *<\/p>\n<\/td>\n The filesystem can employ swap space when physical memory pressure demands it.<\/p>\n<\/td>\n<\/tr>\n *<\/p>\n<\/td>\n The filesystem consumes only as much physical memory and swap space as is required to store the current contents of the filesystem.<\/p>\n<\/td>\n<\/tr>\n *<\/p>\n<\/td>\n During a remount operation (mount\u00a0\u2212o\u00a0remount<\/i>), the filesystem size can be changed (without losing the existing contents of the filesystem).<\/p>\n<\/td>\n<\/tr>\n<\/table>\n If a tmpfs<\/b> filesystem is unmounted, its contents are discarded (lost).<\/p>\n Mount options<\/b> Specify an upper limit on the size of the filesystem. The size is given in bytes, and rounded up to entire pages.<\/p>\n The size may have a k<\/b>, m<\/b>, or g<\/b> suffix for Ki, Mi, Gi (binary kilo (kibi), binary mega (mebi) and binary giga (gibi)).<\/p>\n The size may also have a % suffix to limit this instance to a percentage of physical RAM.<\/p>\n The default, when neither size<\/b> nor nr_blocks<\/b> is specified, is size=50%<\/i>.<\/p>\n nr_blocks<\/b>=blocks<\/i><\/p>\n The same as size<\/b>, but in blocks of PAGE_CACHE_SIZE<\/b>.<\/p>\n Blocks may be specified with k<\/b>, m<\/b>, or g<\/b> suffixes like size<\/b>, but not a % suffix.<\/p>\n nr_inodes<\/b>=inodes<\/i><\/p>\n The maximum number of inodes for this instance. The default is half of the number of your physical RAM pages, or (on a machine with highmem) the number of lowmem RAM pages, whichever is smaller.<\/p>\n Inodes may be specified with k<\/b>, m<\/b>, or g<\/b> suffixes like size<\/b>, but not a % suffix.<\/p>\n mode<\/b>=mode<\/i><\/p>\n Set initial permissions of the root directory.<\/p>\n gid<\/b>=gid<\/i> (since Linux 2.5.7)<\/p>\n Set the initial group ID of the root directory.<\/p>\n uid<\/b>=uid<\/i> (since Linux 2.5.7)<\/p>\n Set the initial user ID of the root directory.<\/p>\n huge<\/b>=huge_option<\/i> (since Linux 4.7.0)<\/p>\n Set the huge table memory allocation policy for all files in this instance (if CONFIG_TRANSPARENT_HUGE_PAGECACHE<\/b> is enabled).<\/p>\n The huge_option<\/i> value is one of the following:<\/p>\n
DESCRIPTION<\/a>
VERSIONS<\/a>
NOTES<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n
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The tmpfs<\/b> filesystem supports the following mount options:
size<\/b>=bytes<\/i><\/p>\n