diff options
| author | Jasper Ras <jras@hostnet.nl> | 2025-01-19 21:14:51 +0100 |
|---|---|---|
| committer | Jasper Ras <jras@hostnet.nl> | 2025-01-19 21:14:51 +0100 |
| commit | 9642cd7ae24f0ba79ce5647c709b35ae8f06a285 (patch) | |
| tree | ae25c3b0db7ae4c23186b294c6d000073f085c2d /3 Resources/Linux/filesystems/Tmpfs.md | |
| parent | 969b96c2531fb986f6c7f21fd544391b439defd7 (diff) | |
vault backup: 2025-01-19 21:14:51
Diffstat (limited to '3 Resources/Linux/filesystems/Tmpfs.md')
| -rw-r--r-- | 3 Resources/Linux/filesystems/Tmpfs.md | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/3 Resources/Linux/filesystems/Tmpfs.md b/3 Resources/Linux/filesystems/Tmpfs.md new file mode 100644 index 0000000..b8fe839 --- /dev/null +++ b/3 Resources/Linux/filesystems/Tmpfs.md @@ -0,0 +1,16 @@ +#linux #filesystem + +--- +Is a [[virtual filesystem]] that is stored in memory; it uses both RAM and swap space. +> Kernel option: CONFIG_TMPFS + +`mount -t tmpfs source target` + +A tmpfs can only grow to 50% of RAM avail. unless overridden with size=nbytes mount option. +Only consumes RAM for actual usage. +Data is ephemeral/volatile. + +Mount stacking: mount over existing /tmp, to improve speed of apps using alot of tmp files, then unmount to delete data. + +Kernel uses tmpfs for [[system v shared memory]] and [[shared anonymous memory mappings]]. +`/dev/shm` or `/run/shm`: [[glibc]] of [[POSIX]] shared memory and [[POSIX]] semaphores.
\ No newline at end of file |