[$] Containers as kernel objects

The kernel has, over the years, gained comprehensive support forcontainers; that, in turn, has helped to drive the rapid growth of a numberof containerization systems. Interestingly, though, the kernel itself hasno concept of what a container is; it just provides a number of facilitiesthat can be used in the creation of containers in user space. DavidHowells is trying to change that state of affairs with a patch set adding containers as a first-classkernel object, but the idea is proving to be a hard sell in the kernelcommunity.