org.freedesktop.oom1(5) — Linux manual page

ORG.FREEDESKTOP.OOM1(5)   org.freedesktop.oom1   ORG.FREEDESKTOP.OOM1(5)

NAME

       org.freedesktop.oom1 - The D-Bus interface of systemd-oomd

INTRODUCTION

       systemd-oomd.service(8) is a system service which implements a
       userspace out-of-memory (OOM) killer. This page describes the
       D-Bus interface.

THE MANAGER OBJECT

       The service exposes the following interfaces on the Manager
       object on the bus:

           node /org/freedesktop/oom1 {
             interface org.freedesktop.oom1.Manager {
               methods:
                 DumpByFileDescriptor(out h fd);
               signals:
                 Killed(s cgroup,
                        s reason);
             };
             interface org.freedesktop.DBus.Peer { ... };
             interface org.freedesktop.DBus.Introspectable { ... };
             interface org.freedesktop.DBus.Properties { ... };
           };

   Methods
       Killed() signal is sent when any cgroup is killed by oomd.

       Note that more reasons will be added in the future, and the table
       below will be expanded accordingly.

       Table 1. Killing reasons
       ┌─────────────────┬──────────────────────────┐
       │ Reason          │ Description              │
       ├─────────────────┼──────────────────────────┤
       │ memory-used     │ Application took too     │
       │                 │ much memory and swap.    │
       ├─────────────────┼──────────────────────────┤
       │ memory-pressure │ Application took enough  │
       │                 │ memory and swap to cause │
       │                 │ sufficient slowdown of   │
       │                 │ other applications.      │
       └─────────────────┴──────────────────────────┘

VERSIONING

       These D-Bus interfaces follow the usual interface versioning
       guidelines[1].

HISTORY

   The Manager Object
       Killed() was added in version 252.

NOTES

        1. the usual interface versioning guidelines
           https://0pointer.de/blog/projects/versioning-dbus.html

COLOPHON

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-13.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                                ORG.FREEDESKTOP.OOM1(5)

Pages that refer to this page: systemd.directives(7), systemd.index(7)

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