chiark / gitweb /
networkd: support vxlan parameters
[elogind.git] / man / systemd.swap.xml
index a932143d43546583d027aa55a0a4d0bed49b3ab7..1155758e28d86aeed6b095278edaab8a80412917 100644 (file)
         </refnamediv>
 
         <refsynopsisdiv>
         </refnamediv>
 
         <refsynopsisdiv>
-                <para><filename>systemd.swap</filename></para>
+                <para><filename><replaceable>swap</replaceable>.swap</filename></para>
         </refsynopsisdiv>
 
         <refsect1>
                 <title>Description</title>
 
                 <para>A unit configuration file whose name ends in
         </refsynopsisdiv>
 
         <refsect1>
                 <title>Description</title>
 
                 <para>A unit configuration file whose name ends in
-                <filename>.swap</filename> encodes information about a
+                <literal>.swap</literal> encodes information about a
                 swap device or file for memory paging controlled and
                 supervised by systemd.</para>
 
                 swap device or file for memory paging controlled and
                 supervised by systemd.</para>
 
                 which define the execution environment the
                 <citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                 binary is executed in, and in
                 which define the execution environment the
                 <citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                 binary is executed in, and in
-                <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                 which define the way the processes are
                 which define the way the processes are
-                terminated.</para>
+                terminated, and in
+                <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+                which configure resource control settings for the
+                processes of the service.</para>
 
                 <para>Swap units must be named after the devices
                 or files they control. Example: the swap device
 
                 <para>Swap units must be named after the devices
                 or files they control. Example: the swap device
-                <filename>/dev/sda5</filename> must be configured in a
+                <filename noindex='true'>/dev/sda5</filename> must be configured in a
                 unit file <filename>dev-sda5.swap</filename>. For
                 details about the escaping logic used to convert a
                 unit file <filename>dev-sda5.swap</filename>. 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
                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
 
                 <para>All swap units automatically get the appropriate
                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
 
                 <para>All swap units automatically get the appropriate
                 for details about the conversion.</para>
 
                 <para>If a swap device or file is configured in both
                 for details about the conversion.</para>
 
                 <para>If a swap device or file is configured in both
-                <filename>/etc/fstab</filename> and a unit file the
+                <filename>/etc/fstab</filename> and a unit file, the
                 configuration in the latter takes precedence.</para>
 
                 configuration in the latter takes precedence.</para>
 
-                <para>Unless the <option>noauto</option> option is set
-                for them all swap units configured in
-                <filename>/etc/fstab</filename> are also added as
-                requirements to <filename>swap.target</filename>, so
-                that they are waited for and activated during
-                boot.</para>
+                <para>When reading <filename>/etc/fstab</filename> a
+                few special options are understood by systemd which
+                influence how dependencies are created for swap
+                units.</para>
+
+                <variablelist class='fstab-options'>
+                  <varlistentry>
+                    <term><option>noauto</option></term>
+                    <term><option>auto</option></term>
+
+                    <listitem><para>With <option>noauto</option> the
+                    swap unit will not be added as a dependency for
+                    <filename>swap.target</filename>. This means that
+                    it will not be activated automatically during
+                    boot, unless it is pulled in by some other
+                    unit. Option <option>auto</option> has the
+                    opposite meaning and is the default.</para>
+                    </listitem>
+                  </varlistentry>
+
+                  <varlistentry>
+                    <term><option>nofail</option></term>
+                    <term><option>fail</option></term>
+
+                    <listitem><para>With <option>nofail</option> the
+                    swap unit will be only wanted, not required by
+                    <filename>swap.target</filename>. This means that
+                    the boot will continue even if this swap device is
+                    not activated successfully. Option
+                    <option>fail</option> has the opposite meaning and
+                    is the default.</para>
+                    </listitem>
+                  </varlistentry>
+                </variablelist>
         </refsect1>
 
         <refsect1>
         </refsect1>
 
         <refsect1>
                 options specific to the [Swap] section of swap units
                 are the following:</para>
 
                 options specific to the [Swap] section of swap units
                 are the following:</para>
 
-                <variablelist>
+                <variablelist class='unit-directives'>
 
                         <varlistentry>
                                 <term><varname>What=</varname></term>
 
                         <varlistentry>
                                 <term><varname>What=</varname></term>
                                 setting is optional.</para></listitem>
                         </varlistentry>
 
                                 setting is optional.</para></listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><varname>Options=</varname></term>
+
+                                <listitem><para>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
+                                <citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+                                for more information.)
+                                </para></listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><varname>TimeoutSec=</varname></term>
                                 <listitem><para>Configures the time to
                                 wait for the swapon command to
                                 finish. If a command does not exit
                         <varlistentry>
                                 <term><varname>TimeoutSec=</varname></term>
                                 <listitem><para>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
                                 will be considered failed and be shut
                                 down again. All commands still running
                                 will be terminated forcibly via
-                                SIGTERM, and after another delay of
-                                this time with SIGKILL. (See
+                                <constant>SIGTERM</constant>, and after another delay of
+                                this time with <constant>SIGKILL</constant>. (See
                                 <option>KillMode=</option> in
                                 <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.)
                                 Takes a unit-less value in seconds, or
                                 a time span value such as "5min
                                 <option>KillMode=</option> in
                                 <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.)
                                 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.</para></listitem>
+                                20s". Pass <literal>0</literal> to disable the timeout
+                                logic. Defaults to <varname>DefaultTimeoutStartSec=</varname> from the
+                                manager configuration file
+                                (see <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>).
+                                </para></listitem>
                         </varlistentry>
                 </variablelist>
 
                         </varlistentry>
                 </variablelist>
 
                   <title>See Also</title>
                   <para>
                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                   <title>See Also</title>
                   <para>
                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                          <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+                          <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+                          <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                          <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
                   </para>
         </refsect1>
 
                   </para>
         </refsect1>