Tracing


 * https://events.linuxfoundation.org/events/collaboration-summit/rostedt
 * https://events.linuxfoundation.org/images/stories/pdf/lfcs2012_rostedt.pdf
 * http://video.linux.com/videos/removing-stop-machine-from-the-tracing-infrastructure


 * https://events.linuxfoundation.org/images/stories/pdf/lfcs2012_zannoni_hees.pdf
 * http://video.linux.com/videos/dtrace