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-rw-r--r--docs/interop/vhost-user.rst21
1 files changed, 11 insertions, 10 deletions
diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst
index dc0ff9211f..5750668aba 100644
--- a/docs/interop/vhost-user.rst
+++ b/docs/interop/vhost-user.rst
@@ -324,19 +324,20 @@ must support changing some configuration aspects on the fly.
Multiple queue support
----------------------
-Multiple queue is treated as a protocol extension, hence the slave has
-to implement protocol features first. The multiple queues feature is
-supported only when the protocol feature ``VHOST_USER_PROTOCOL_F_MQ``
-(bit 0) is set.
+Multiple queue support allows the slave to advertise the maximum number of
+queues. This is treated as a protocol extension, hence the slave has to
+implement protocol features first. The multiple queues feature is supported
+only when the protocol feature ``VHOST_USER_PROTOCOL_F_MQ`` (bit 0) is set.
-The max number of queue pairs the slave supports can be queried with
-message ``VHOST_USER_GET_QUEUE_NUM``. Master should stop when the
-number of requested queues is bigger than that.
+The max number of queues the slave supports can be queried with message
+``VHOST_USER_GET_QUEUE_NUM``. Master should stop when the number of requested
+queues is bigger than that.
As all queues share one connection, the master uses a unique index for each
-queue in the sent message to identify a specified queue. One queue pair
-is enabled initially. More queues are enabled dynamically, by sending
-message ``VHOST_USER_SET_VRING_ENABLE``.
+queue in the sent message to identify a specified queue.
+
+The master enables queues by sending message ``VHOST_USER_SET_VRING_ENABLE``.
+vhost-user-net has historically automatically enabled the first queue pair.
Migration
---------