sched: Change ttwu_runnable() vs sched_delayed
Change how TTWU handles sched_delayed tasks.
Currently sched_delayed tasks are seen as on_rq and will hit
ttwu_runnable(), which treats sched_delayed tasks the same as other
on_rq tasks, it makes them runnable on the runqueue they're on.
However, tasks that were dequeued (and not delayed) will get a
different wake-up path, notably they will pass through wakeup
balancing.
Change ttwu_runnable() to dequeue delayed tasks and report it isn't
on_rq after all, ensuring the task continues down the regular wakeup
path.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
1 file changed
