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Diffstat (limited to 'man/systemd.exec.xml')
| -rw-r--r-- | man/systemd.exec.xml | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml index dbfc7692f7..ed02666daf 100644 --- a/man/systemd.exec.xml +++ b/man/systemd.exec.xml @@ -1413,6 +1413,19 @@ </para></listitem> </varlistentry> + <varlistentry> + <term><varname>RestrictRealtime=</varname></term> + + <listitem><para>Takes a boolean argument. If set, any attempts to enable realtime scheduling in a process of + the unit are refused. This restricts access to realtime task scheduling policies such as + <constant>SCHED_FIFO</constant>, <constant>SCHED_RR</constant> or <constant>SCHED_DEADLINE</constant>. See + <citerefentry><refentrytitle>sched</refentrytitle><manvolnum>7</manvolnum></citerefentry> for details about + these scheduling policies. Realtime scheduling policies may be used to monopolize CPU time for longer periods + of time, and may hence be used to lock up or otherwise trigger Denial-of-Service situations on the system. It + is hence recommended to restrict access to realtime scheduling to the few programs that actually require + them. Defaults to off.</para></listitem> + </varlistentry> + </variablelist> </refsect1> |