Re: [PATCH RT] sched/core: Avoid__schedule() being called twice, the second in vain

[Sebastian Andrzej Siewior]

On 2018-07-30 15:00:00 [+0200], Daniel Bristot de Oliveira wrote:
> Before calling __schedule() to cause a context switch, the schedule()
> function runs sched_submit_work() to dispatch deferred work that was
> postponed to the point that the thread is leaving the processor.
> The function sched_submit_work() checks for the need to wake up a
> kworker; if needed, a kworker thread is awakened. In this context,
> the following behavior takes place.
â
> at line 11, there is nothing to schedule, and so the __schedule() at
> line 18 is called in vain.

I read this as an optimisation for the common case as you put it. 
Applied.

Sebastian