document lxc.rootfs.backend

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

diff --git a/doc/lxc.container.conf.sgml.in b/doc/lxc.container.conf.sgml.in
index 733519f47c762de812e8e06768d76bad92dcffb6..05baddd39ceed689aecca40c18e7810787fd1f71 100644 (file)
--- a/doc/lxc.container.conf.sgml.in
+++ b/doc/lxc.container.conf.sgml.in
@@ -1091,6 +1091,20 @@ proc proc proc nodev,noexec,nosuid 0 0
           </listitem>
         </varlistentry>
 
+        <varlistentry>
+          <term>
+            <option>lxc.rootfs.backend</option>
+          </term>
+          <listitem>
+            <para>
+              specify the rootfs backend type to use, for instance 'dir' or
+             'zfs'.  While this can be guessed by lxc at container startup,
+             doing so takes time.  Specifying it here avoids extra
+             processing.
+            </para>
+          </listitem>
+        </varlistentry>
+
       </variablelist>
     </refsect2>