+ <varlistentry>
+ <term><varname>Discard=</varname></term>
+
+ <listitem><para>Enable discards, if the swap
+ backing device supports the discard or trim
+ operation. Can be one of <literal>none</literal>,
+ <literal>once</literal>, <literal>pages</literal>
+ or <literal>all</literal>. Defaults to
+ <literal>none</literal>. (See
+ <citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ for more information.)
+ </para></listitem>
+ </varlistentry>
+