notification of device configuration changes, especially link status (lsc).
Interrupt mode is translated into Rx interrupts in the context of DPDK.
+.. Note::
+
+ Virtio PMD already has support for receiving lsc from qemu when the link
+ status changes, especially when vhost user disconnects. However, it fails
+ to do that if the VM is created by qemu 2.6.2 or below, since the
+ capability to detect vhost user disconnection is introduced in qemu 2.7.0.
+
Prerequisites for Rx interrupts
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~