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.