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| author | Jasper Ras <jras@hostnet.nl> | 2025-01-08 10:48:09 +0100 |
|---|---|---|
| committer | Jasper Ras <jras@hostnet.nl> | 2025-01-08 10:48:09 +0100 |
| commit | ed0753ad224f0c65133bd7a63180257eecd9f5e3 (patch) | |
| tree | cc662868574fe17db58be9e0faadd452c84dc59c /.trash/3 resources/linux/filesystems/tmpfs.md | |
| parent | 493be30dc981eaf762a95a1218f96893b1976727 (diff) | |
vault backup: 2025-01-08 10:48:09
Diffstat (limited to '.trash/3 resources/linux/filesystems/tmpfs.md')
| -rw-r--r-- | .trash/3 resources/linux/filesystems/tmpfs.md | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/.trash/3 resources/linux/filesystems/tmpfs.md b/.trash/3 resources/linux/filesystems/tmpfs.md new file mode 100644 index 0000000..624c835 --- /dev/null +++ b/.trash/3 resources/linux/filesystems/tmpfs.md @@ -0,0 +1,13 @@ +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.
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