OVS main thread needs to make a lot of use of the rtnl subsystem to query, create and delete interfaces, addresses, etc.

Many of this actions required holding the RTNL lock. When many interfaces go up and down, specially if the are SR-IOV VFs, RTNL contention can slow down these requests making it hard for the main thread to complete it's tasks in a timely manner.

This epic involves analyzing what areas of OVS can be improved and tasks to improve them.