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-rw-r--r--man5/tmpfs.532
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