+static void
+virtio_user_mem_event_cb(enum rte_mem_event type __rte_unused,
+ const void *addr __rte_unused,
+ size_t len __rte_unused,
+ void *arg)
+{
+ struct virtio_user_dev *dev = arg;
+ uint16_t i;
+
+ pthread_mutex_lock(&dev->mutex);
+
+ if (dev->started == false)
+ goto exit;
+
+ /* Step 1: pause the active queues */
+ for (i = 0; i < dev->queue_pairs; i++)
+ dev->ops->enable_qp(dev, i, 0);
+
+ /* Step 2: update memory regions */
+ dev->ops->send_request(dev, VHOST_USER_SET_MEM_TABLE, NULL);
+
+ /* Step 3: resume the active queues */
+ for (i = 0; i < dev->queue_pairs; i++)
+ dev->ops->enable_qp(dev, i, 1);
+
+exit:
+ pthread_mutex_unlock(&dev->mutex);
+}
+