Comment by PaulDavisThe1st

We don't care much about "full preemption" because the only threads that have time-critical behavior are all scheduled in the SCHED_FIFO and/or SCHED_RR classes. If you had other workloads that could benefit from preemption without using realtime scheduling, then full preemption could be the way to go.

We haven't really tested this sort of thing for quite a few years.