Re: [PATCH v3 tip/core/rcu 1/9] rcu: Add call_rcu_tasks()

Paul E. McKenney
2014-08-04T13:48:36Z

On Mon, Aug 04, 2014 at 03:29:27PM +0200, Oleg Nesterov wrote:
> On 08/03, Paul E. McKenney wrote:
> >
> > If I understand correctly, your goal is to remove a synchronize_sched()
> > worth of latency from the overall RCU-tasks callback latency. Or am I
> > still confused?
>
> Yes, exactly. But again, I am not sure this minor optimization makes sense,
> mostly I tried to check my understanding.

No problem with your understanding! ;-)

I am not going to include this optimization in the first round, but
I will certainly keep it in mind should grace-period latency from
nearly concurrent updates become a problem.

Thanx, Paul