[$] Completing the EEVDF scheduler

The Earliest Virtual Deadline First (EEVDF)
scheduler was merged as an option for the 6.6 kernel. It represents a
major change to how CPU scheduling is done on Linux systems, but the EEVDF
front has been relatively quiet since then. Now, though, scheduler
developer Peter Zijlstra has returned from a long absence to post a patch
series intended to finish the EEVDF work. Beyond some fixes, this work
includes a significant behavioral change and a new feature intended to help
latency-sensitive tasks.