Re: [RFC v2 4/7] Fix the update of the total -deadline utilization

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [RFC v2 4/7] Fix the update of the total -deadline utilization
Date	2016-04-05 15:00 +0200
Message-ID	<rkyKn-3D8-47@gated-at.bofh.it> (permalink)
References	<rj91E-6gd-5@gated-at.bofh.it> <rj91F-6gd-29@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Apr 01, 2016 at 05:12:30PM +0200, Luca Abeni wrote:
> +		/*
> +		 * XXX this is slightly incorrect: when the task
> +		 * utilization decreases, we should delay the total
> +		 * utilization change until the task's 0-lag point.
> +		 * But this would require to set the task's "inactive
> +		 * timer" when the task is not inactive.
> +		 */

Could you quickly remind me why this is a problem? The timeline does
continue running right? So even if the task isn't active now, it will
still reach its 0-lag point.

>  		__dl_clear(dl_b, p->dl.dl_bw);
>  		__dl_add(dl_b, new_bw);
>  		err = 0;

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Re: [RFC v2 4/7] Fix the update of the total -deadline utilization Peter Zijlstra <peterz@infradead.org> - 2016-04-05 15:00 +0200
  Re: [RFC v2 4/7] Fix the update of the total -deadline utilization luca abeni <luca.abeni@unitn.it> - 2016-04-05 19:20 +0200

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