2 <!DOCTYPE refentry PUBLIC
"-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" >
4 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
6 <refentry id=
"org.freedesktop.oom1" conditional='ENABLE_OOMD'
7 xmlns:
xi=
"http://www.w3.org/2001/XInclude">
9 <title>org.freedesktop.oom1
</title>
10 <productname>systemd
</productname>
14 <refentrytitle>org.freedesktop.oom1
</refentrytitle>
15 <manvolnum>5</manvolnum>
19 <refname>org.freedesktop.oom1
</refname>
20 <refpurpose>The D-Bus interface of systemd-oomd
</refpurpose>
24 <title>Introduction
</title>
27 <citerefentry><refentrytitle>systemd-oomd.service
</refentrytitle><manvolnum>8</manvolnum></citerefentry>
28 is a system service which implements a userspace out-of-memory (OOM) killer. This page describes the
29 D-Bus interface.
</para>
33 <title>The Manager Object
</title>
35 <para>The service exposes the following interfaces on the Manager object on the bus:
</para>
37 <programlisting executable=
"systemd-oomd" node=
"/org/freedesktop/oom1" interface=
"org.freedesktop.oom1.Manager">
38 node /org/freedesktop/oom1 {
39 interface org.freedesktop.oom1.Manager {
41 DumpByFileDescriptor(out h fd);
46 interface org.freedesktop.DBus.Peer { ... };
47 interface org.freedesktop.DBus.Introspectable { ... };
48 interface org.freedesktop.DBus.Properties { ... };
52 <!--method DumpByFileDescriptor is not documented!-->
54 <!--Autogenerated cross-references for systemd.directives, do not edit-->
56 <variablelist class=
"dbus-interface" generated=
"True" extra-ref=
"org.freedesktop.oom1.Manager"/>
58 <variablelist class=
"dbus-interface" generated=
"True" extra-ref=
"org.freedesktop.oom1.Manager"/>
60 <variablelist class=
"dbus-method" generated=
"True" extra-ref=
"DumpByFileDescriptor()"/>
62 <variablelist class=
"dbus-signal" generated=
"True" extra-ref=
"Killed()"/>
64 <!--End of Autogenerated section-->
67 <title>Methods
</title>
69 <para><function>Killed()
</function> signal is sent when any cgroup is killed by oomd.
</para>
70 <para>Note that more reasons will be added in the future, and the table below will be expanded accordingly.
</para>
72 <title>Killing reasons
</title>
73 <tgroup cols=
"2" align=
"left" colsep=
"1" rowsep=
"1">
74 <colspec colname=
"reason"/>
75 <colspec colname=
"description"/>
79 <entry>Description
</entry>
84 <entry>memory-used
</entry>
85 <entry>Application took too much memory and swap.
</entry>
88 <entry>memory-pressure
</entry>
89 <entry>Application took enough memory and swap to cause sufficient slowdown of other applications.
</entry>
97 <xi:include href=
"org.freedesktop.locale1.xml" xpointer=
"versioning"/>
100 <title>History
</title>
102 <title>The Manager Object
</title>
103 <para><function>Killed()
</function> was added in version
252.
</para>