X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=doc%2Fguides%2Fprog_guide%2Fvhost_lib.rst;h=6b0c6b2649315589b340ad9f6b5e21a854e0aa46;hb=7b53c036e6bf56623b8273018ff1c8cc62847857;hp=14d5e675904127fc357d6ddf2ef320948718466b;hpb=5d4e5dcd8a186778b3d78e27c81550d07a288fd2;p=deb_dpdk.git

diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst
index 14d5e675..6b0c6b26 100644
--- a/doc/guides/prog_guide/vhost_lib.rst
+++ b/doc/guides/prog_guide/vhost_lib.rst
@@ -189,7 +189,12 @@ vhost-user implementation has two options:
   When the DPDK vhost-user application restarts, DPDK vhost-user will try to
   connect to the server again. This is how the "reconnect" feature works.
 
-  Note: the "reconnect" feature requires **QEMU v2.7** (or above).
+  .. Note::
+     * The "reconnect" feature requires **QEMU v2.7** (or above).
+
+     * The vhost supported features must be exactly the same before and
+       after the restart. For example, if TSO is disabled and then enabled,
+       nothing will work and issues undefined might happen.
 
 No matter which mode is used, once a connection is established, DPDK
 vhost-user will start receiving and processing vhost messages from QEMU.