pub fn start() -> !Expand description
Start the preemptive scheduler. Never returns — control transfers permanently to whichever task the scheduler selects first (and from there, forever between tasks via interrupt-driven context switches).
Call this from hart 0 only; secondary harts (plan.md Phase 19) use
start_secondary_hart instead.
§Panics
Panics if no preemptive tasks have been spawned.