+ url="http://www.kernel.org/doc/Documentation/cgroups/cgroups.txt">cgroups.txt</ulink>.</para>
+
+ <para>This option may appear more than
+ once, in which case the list of
+ control group assignments is
+ merged. If the same hierarchy gets two
+ different paths assigned only the
+ later setting will take effect. If the
+ empty string is assigned to this
+ option the list of control group
+ assignments is reset, all previous
+ assignments will have no
+ effect.</para>
+
+ <para>Note that the list of control
+ group assignments of a unit is
+ extended implicitly based on the
+ settings of
+ <varname>DefaultControllers=</varname>
+ of
+ <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ but a unit's
+ <varname>ControlGroup=</varname>
+ setting for a specific controller
+ takes precedence.</para></listitem>