"The Secret To 10 Million Concurrent Connections -The Kernel Is The Problem, Not The Solution":
http://highscalability.com/blog/2013/5/13/the-secret-to-10-m...
http://highscalability.com/blog/2013/5/13/the-secret-to-10-m...
Really interesting read. Some of the notions espoused in this link really seem to make a case for microkernels.