linux-kernel - Re: [RFC PATCH v2 07/25] sched/rt: Introduce HCBS specific structs in task

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Message-ID: <aJ3bwJ5eRtjffd-u@jlelli-thinkpadt14gen4.remote.csb>
Date: Thu, 14 Aug 2025 14:51:12 +0200
From: Juri Lelli <juri.lelli@...hat.com>
To: Yuri Andriaccio <yurand2000@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	linux-kernel@...r.kernel.org,
	Luca Abeni <luca.abeni@...tannapisa.it>,
	Yuri Andriaccio <yuri.andriaccio@...tannapisa.it>
Subject: Re: [RFC PATCH v2 07/25] sched/rt: Introduce HCBS specific structs
 in task_group

Hi!

On 31/07/25 12:55, Yuri Andriaccio wrote:

...

> @@ -467,9 +474,15 @@ struct task_group {
>  
>  #ifdef CONFIG_RT_GROUP_SCHED
>  	struct sched_rt_entity	**rt_se;
> +	/*
> +	 * The scheduling entities for the task group are managed as a single
> +	 * sched_dl_entity, each of them sharing the same dl_bandwidth.
> +	 */
> +	struct sched_dl_entity	**dl_se;

This is actually one sched_dl_entity per CPU, right? If that is the case
the comment is a little misleading I am afraid (mentioning single
entitiy).

Thanks,
Juri