<filename>/etc/fstab</filename> and a unit file, the
configuration in the latter takes precedence.</para>
- <para>Unless the <option>noauto</option> option is set
- for them all swap units configured in
- <filename>/etc/fstab</filename> are also added as
- requirements to <filename>swap.target</filename>, so
- that they are waited for and activated during
- boot.</para>
+ <para>When reading <filename>/etc/fstab</filename> a
+ few special options are understood by systemd which
+ influence how dependencies are created for swap
+ units.</para>
+
+ <variablelist class='fstab-options'>
+ <varlistentry>
+ <term><option>noauto</option></term>
+ <term><option>auto</option></term>
+
+ <listitem><para>With <option>noauto</option> the
+ swap unit will not be added as a dependency for
+ <filename>swap.target</filename>. This means that
+ it will not be activated automatically during
+ boot, unless it is pulled in by some other
+ unit. Option <option>auto</option> has the
+ opposite meaning and is the default.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>nofail</option></term>
+
+ <listitem><para>With <option>nofail</option> the
+ swap unit will be only wanted, not required by
+ <filename>swap.target</filename>. This means that
+ the boot will continue even if this swap device is
+ not activated successfully.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
</refsect1>
<refsect1>
</varlistentry>
<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
+ <term><varname>Options=</varname></term>
+
+ <listitem><para>May contain an option
+ string for the swap device. This may
+ be used for controlling discard
+ options among other functionality, if
+ the swap backing device supports the
+ discard or trim operation. (See
<citerefentry><refentrytitle>swapon</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for more information.)
</para></listitem>