[libvirt] [PATCH] Document the domain XML cache attribute for disk devices

[Matthias Bolte]

---
 docs/formatdomain.html.in |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 46ab0ac..af31699 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -343,7 +343,7 @@
     <pre>
           ...
           <disk type='file'>
-            <driver name="tap" type="aio">
+            <driver name="tap" type="aio" cache="default">
             <source file='/var/lib/xen/images/fv0'/>
             <target dev='hda' bus='ide'/>
             <encryption type='...'>
@@ -383,7 +383,9 @@
       <dd>If the hypervisor supports multiple backend drivers, then the optional
         <code>driver</code> element allows them to be selected. The <code>name</code>
         attribute is the primary backend driver name, while the optional <code>type</code>
-        attribute provides the sub-type. <span class="since">Since 0.1.8</span>
+        attribute provides the sub-type. The optional <code>cache</code> attribute
+        controls the cache mechanism, possible values are "default", "none",
+        "writethrough" and "writeback". <span class="since">Since 0.1.8</span>
       </dd>
       <dt><code>encryption</code></dt>
       <dd>If present, specifies how the volume is encrypted.  See
-- 
1.6.0.4