Re: [RFC 4/8] Improve the tracking of active utilisation

[Peter Zijlstra]

On Thu, Jan 14, 2016 at 04:24:49PM +0100, Luca Abeni wrote:

> +	if (!hrtimer_is_queued(timer)) {
> +		hrtimer_start(timer, act, HRTIMER_MODE_ABS);
> +	}
> +
> +	if (hrtimer_active(timer) == 0) {
> +		printk("Problem activating inactive_timer!\n");
> +		clear_running_bw(dl_se, dl_rq);
> +		if (!dl_task(p)) {
> +			__dl_clear_params(p);
> +		}
> +	} else {
> +		get_task_struct(p);

Ah, I missed that one. I would suggest putting that right _before_
hrtimer_start(), because hrtimer_start() guarantees the callback will
run.

> +	}