- Introduction to Linux Control Groups (sysadmincasts)
- Introduction to Control Groups (RHEL 7)
- Subsystems and Tunable Parameters (RHEL 6 – at least theoretically relevant to modern Fedora/RHEL/CentOS systems)
- cgroups (Kernel.org)
- virsh manual (libvirt – under construction – I may contribute, though I do want everything to be duplicated in the man pages for the sake of maintaining the awesomeness that is the UNIX/GNU man system)
The first three links provide excellent introductions (with the second being more technically inclined and detailed).
The fourth link provides a great guide to implementing the understanding gained from reading the first three.
Given the hardware platform on which I am building my electric mountain (an implementation of a forthcoming theoretical architecture for home server complexes), I need to be able to very specifically regulate resource usage, and KVM/QEMU/libvirt provide, by far, the greatest and most sophisticated free and open source platform for exercising such control. In fact, I have yet to witness a clearly superior closed-source solution.