Kernel calls and cgroupfs are the main functions we use. cgroupfs is a file system, so it only reads and writes to files. I think it can do simple things. Of co

Kernel calls and cgroupfs are the main functions we use. cgroupfs is a file system, so it only reads and writes to files. I think it can do simple things. Of course, I started out with something very simple. It's fun to do just a little bit.