3.6 KiB
3.6 KiB
obj | wiki | arch-wiki |
---|---|---|
filesystem | https://en.wikipedia.org/wiki/Tmpfs | https://wiki.archlinux.org/title/Tmpfs |
tmpFS
tmpfs is a temporary filesystem that resides in memory and/or swap partition(s). Mounting directories as tmpfs can be an effective way of speeding up accesses to their files, or to ensure that their contents are automatically cleared upon reboot.
Usage
Create a tmpfs:
mount -t tmpfs -o [OPTIONS] tmpfs [MOUNT_POINT]
Resize a tmpfs:
mount -t tmpfs -o remount,size=<NEW_SIZE> tmpfs [MOUNT_POINT]
Options
Option | Description |
---|---|
size=bytes |
Specify an upper limit on the size of the filesystem. Size is given in bytes, rounded up to entire pages. A k , m , or g suffix can be used for Ki, Mi, or Gi. Use % to specify a percentage of physical RAM. Default: 50%. Set to 0 to remove the limit. |
nr_blocks=blocks |
Similar to size , but in blocks of PAGE_CACHE_SIZE . Accepts k , m , or g suffixes, but not % . |
nr_inodes=inodes |
Sets the maximum number of inodes. Default is half the number of physical RAM pages or the number of lowmem RAM pages (whichever is smaller). Use k , m , or g suffixes, but % is not supported. Set to 0 to remove the limit. |
noswap |
Disables swap. Remounts must respect the original settings. By default, swap is enabled. |
mode=mode |
Sets the initial permissions of the root directory. |
gid=gid |
Sets the initial group ID of the root directory. |
uid=uid |
Sets the initial user ID of the root directory. |
huge=huge_option |
Sets the huge table memory allocation policy for all files (if CONFIG_TRANSPARENT_HUGEPAGE is enabled). Options: never (default), always , within_size , advise , deny , or force . |
mpol=mpol_option |
Sets NUMA memory allocation policy (if CONFIG_NUMA is enabled). Options: default , prefer:node , bind:nodelist , interleave , interleave:nodelist , or local . Example: mpol=bind:0-3,5,7,9-15 . |