[libvirt] [PATCH 3/3] docs: add docs for percentage limit

[Chen Hanxiao]

From: Chen Hanxiao <chenhanxiao at cn.fujitsu.com>

Signed-off-by: Chen Hanxiao <chenhanxiao at cn.fujitsu.com>
---
 docs/formatdomain.html.in | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 096e2a3..ac330cb 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2233,7 +2233,9 @@
           An in-memory filesystem, using memory from the host OS.
           The source element has a single attribute <code>usage</code>
           which gives the memory usage limit in KiB, unless units
-          are specified by the <code>units</code> attribute. Only used
+          are specified by the <code>units</code> attribute.
+          Attribute <code>usage</code> with a suffix % will gives
+          the memory usage limit by percentage.Only used
           by LXC driver.
           <span class="since"> (since 0.9.13)</span></dd>
         <dt><code>type='bind'</code></dt>
-- 
1.8.2.1