DescriptionA unit configuration file whose name ends in
- .swap encodes information about a
+ .swap encodes information about a
swap device or file for memory paging controlled and
supervised by systemd.
@@ -73,16 +73,19 @@
which define the execution environment the
swapon8
binary is executed in, and in
- systemd.kill5
+ systemd.kill5,
which define the way the processes are
- terminated.
+ terminated, and in
+ systemd.resource-control5,
+ which configure resource control settings for the
+ processes of the service.
Swap units must be named after the devices
or files they control. Example: the swap device
/dev/sda5 must be configured in a
unit file dev-sda5.swap. For
details about the escaping logic used to convert a
- file system path to a unit name see
+ file system path to a unit name, see
systemd.unit5.All swap units automatically get the appropriate
@@ -111,7 +114,7 @@
for details about the conversion.If a swap device or file is configured in both
- /etc/fstab and a unit file the
+ /etc/fstab and a unit file, the
configuration in the latter takes precedence.Unless the option is set
@@ -167,12 +170,26 @@
setting is optional.
+
+ Options=
+
+ May contain an option
+ string for the swap device. This may
+ be used for controlling discard
+ options among other functionality, if
+ the swap backing device supports the
+ discard or trim operation. (See
+ swapon8
+ for more information.)
+
+
+
TimeoutSec=Configures the time to
wait for the swapon command to
finish. If a command does not exit
- within the configured time the swap
+ within the configured time, the swap
will be considered failed and be shut
down again. All commands still running
will be terminated forcibly via
@@ -182,9 +199,11 @@
systemd.kill5.)
Takes a unit-less value in seconds, or
a time span value such as "5min
- 20s". Pass 0 to disable the timeout
- logic. Defaults to
- 90s.
+ 20s". Pass 0 to disable the timeout
+ logic. Defaults to DefaultTimeoutStartSec= from the
+ manager configuration file
+ (see systemd-system.conf5).
+
@@ -199,10 +218,11 @@
See Alsosystemd1,
- systemctl8,
+ systemctl1,
systemd.unit5,
systemd.exec5,
systemd.kill5,
+ systemd.resource-control5,
systemd.device5,
systemd.mount5,
swapon8,