Re: [PATCH tip/core/timers 4/4] timers: Reduce future__run_timers() latency for first add to empty list

[Oleg Nesterov]

On 01/14, Paul E. McKenney wrote:
>
> @@ -749,6 +749,7 @@ __mod_timer(struct timer_list *timer, unsigned long expires,
>
>  	base = lock_timer_base(timer, &flags);
>
> +	(void)catchup_timer_jiffies(base);

Agreed, but perhaps it would be better to do this before
all_timers++ in internal_add_timer() ?

This is funny, but I already have the same change for ->next_timer,
if we add this optimization perhaps that trivial patch makes sense
too.

Oleg.

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