Adding stackless threading to BSD Kernel?

Question

IronPort developed a stackless threading model that allows the IronPort appliance to support more than 10,000 simultaneous connections in contrast to the 100 connections supported on a traditional OS.

If one wanted to do the same but to make it open source, where should they start?

Answer 1

There are some implementations already available. Just do some digging around and you can find them. One of the most prevalent implementations is available under a BSD license: Protothreads

Answer 2

What you need is coroutines http://www.nightmare.com/~rushing/copython/index.html