diff options
Diffstat (limited to 'man5/tmpfs.5')
| -rw-r--r-- | man5/tmpfs.5 | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/man5/tmpfs.5 b/man5/tmpfs.5 index 8e4d063..55fc826 100644 --- a/man5/tmpfs.5 +++ b/man5/tmpfs.5 @@ -2,7 +2,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH tmpfs 5 2023-07-28 "Linux man-pages 6.05.01" +.TH tmpfs 5 2023-10-31 "Linux man-pages 6.7" .SH NAME tmpfs \- a virtual memory filesystem .SH DESCRIPTION @@ -12,18 +12,18 @@ 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. -.PP +.P The filesystem is automatically created when mounting a filesystem with the type .B tmpfs via a command such as the following: -.PP +.P .in +4n .EX $ sudo mount \-t tmpfs \-o size=10M tmpfs /mnt/mytmpfs .EE .in -.PP +.P A .B tmpfs filesystem has the following properties: @@ -38,7 +38,7 @@ During a remount operation .RI ( "mount\ \-o\ remount" ), the filesystem size can be changed (without losing the existing contents of the filesystem). -.PP +.P If a .B tmpfs filesystem is unmounted, its contents are discarded (lost). @@ -51,6 +51,8 @@ filesystem supports the following mount options: .BR size "=\fIbytes\fP" Specify an upper limit on the size of the filesystem. The size is given in bytes, and rounded up to entire pages. +The limit is removed if the size is +.BR 0 . .IP The size may have a .BR k , @@ -89,6 +91,8 @@ but not a % suffix. 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. +The limit is removed if the number is +.BR 0 . .IP Inodes may be specified with .BR k , @@ -99,6 +103,12 @@ suffixes like .BR size , but not a % suffix. .TP +.BR noswap "(since Linux 6.4)" +.\" commit 2c6efe9cf2d7841b75fe38ed1adbd41a90f51ba0 +Disables swap. +Remounts must respect the original settings. +By default swap is enabled. +.TP .BR mode "=\fImode\fP" Set initial permissions of the root directory. .TP @@ -208,7 +218,7 @@ In order for user-space tools and applications to create filesystems, the kernel must be configured with the .B CONFIG_TMPFS option. -.PP +.P The .B tmpfs filesystem supports extended attributes (see @@ -216,7 +226,7 @@ filesystem supports extended attributes (see but .I user extended attributes are not permitted. -.PP +.P An internal shared memory filesystem is used for System V shared memory .RB ( shmget (2)) @@ -231,7 +241,7 @@ This filesystem is available regardless of whether the kernel was configured with the .B CONFIG_TMPFS option. -.PP +.P A .B tmpfs filesystem mounted at @@ -240,7 +250,7 @@ is used for the implementation of POSIX shared memory .RB ( shm_overview (7)) and POSIX semaphores .RB ( sem_overview (7)). -.PP +.P The amount of memory consumed by all .B tmpfs filesystems is shown in the @@ -251,7 +261,7 @@ and in the .I shared field displayed by .BR free (1). -.PP +.P The .B tmpfs facility was formerly called @@ -264,7 +274,7 @@ facility was formerly called .BR set_mempolicy (2), .BR shm_open (3), .BR mount (8) -.PP +.P The kernel source files .I Documentation/filesystems/tmpfs.txt and |