[$] LCE: Realtime, present and future

As the standing-room-only crowd at Thomas Gleixner's LinuxCon Europe 2012
talk showed, there is still a lot of interest in the progress of the
realtime preemption patch set. Your editor attended with the main purpose
of heckling Thomas, thinking that our recent Realtime Linux
Workshop coverage
would include most of the information to be heard in
Barcelona. As it turns out, though, there were some new things to be
learned, along with some concerns about the possible return of an old
problem in a new form.