json: simplify JSON_VARIANT_OBJECT_FOREACH() macro a bit

[thirdparty/systemd.git] / man / systemd.service.xml

diff --git a/man/systemd.service.xml b/man/systemd.service.xml
index b9a3266dfd7c798b28182c1bf556acedc913a69e..1f40c2ff378e8b912a836aee9f85f1d774e62320 100644 (file)
--- a/man/systemd.service.xml
+++ b/man/systemd.service.xml
@@ -59,6 +59,10 @@
     about the incompatibilities, see the <ulink
     url="https://www.freedesktop.org/wiki/Software/systemd/Incompatibilities">Incompatibilities
     with SysV</ulink> document.</para>
+
+    <para>The <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+    command allows creating <filename>.service</filename> and <filename>.scope</filename> units dynamically
+    and transiently from the command line.</para>
   </refsect1>
 
   <refsect1>
@@ -959,6 +963,29 @@
         above.</para></listitem>
       </varlistentry>
 
+      <varlistentry>
+        <term><varname>OOMPolicy=</varname></term>
+
+        <listitem><para>Configure the Out-Of-Memory (OOM) killer policy. On Linux, when memory becomes scarce
+        the kernel might decide to kill a running process in order to free up memory and reduce memory
+        pressure. This setting takes one of <constant>continue</constant>, <constant>stop</constant> or
+        <constant>kill</constant>. If set to <constant>continue</constant> and a process of the service is
+        killed by the kernel's OOM killer this is logged but the service continues running. If set to
+        <constant>stop</constant> the event is logged but the service is terminated cleanly by the service
+        manager. If set to <constant>kill</constant> and one of the service's processes is killed by the OOM
+        killer the kernel is instructed to kill all remaining processes of the service, too. Defaults to the
+        setting <varname>DefaultOOMPolicy=</varname> in
+        <citerefentry><refentrytitle>system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> is
+        set to, except for services where <varname>Delegate=</varname> is turned on, where it defaults to
+        <constant>continue</constant>.</para>
+
+        <para>Use the <varname>OOMScoreAdjust=</varname> setting to configure whether processes of the unit
+        shall be considered preferred or less preferred candidates for process termination by the Linux OOM
+        killer logic. See
+        <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
+        details.</para></listitem>
+      </varlistentry>
+
     </variablelist>
 
     <para>Check
@@ -1429,7 +1456,8 @@ WantedBy=multi-user.target</programlisting>
         <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
         <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
         <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
-        <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+        <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+        <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>
       </para>
   </refsect1>