linux-kernel - Re: [RFC PATCH v4 16/28] sched/rt: Remove old RT_GROUP

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Message-ID: <aXCtdmRpBK7To7eC@jlelli-thinkpadt14gen4.remote.csb>
Date: Wed, 21 Jan 2026 11:41:58 +0100
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 v4 16/28] sched/rt: Remove old RT_GROUP_SCHED data
 structures

Hello,

On 01/12/25 13:41, Yuri Andriaccio wrote:
> From: luca abeni <luca.abeni@...tannapisa.it>
> 
> Completely remove the old RT_GROUP_SCHED's functions and data structures:
> 
> - Remove the fields back and my_q from sched_rt_entity.
> - Remove the rt_bandwidth data structure.
> - Remove the field rt_bandwidth from task_group.
> - Remove the rt_bandwidth_enabled function.
> - Remove the fields rt_queued, rt_throttled, rt_time, rt_runtime,
>   rt_runtime_lock and rt_nr_boosted from rt_rq.
> 
> All of the removed fields and data are similarly represented in previously
> added fields in rq, rt_rq, dl_bandwidth and in the dl server themselves.
> 
> Co-developed-by: Yuri Andriaccio <yurand2000@...il.com>
> Signed-off-by: Yuri Andriaccio <yurand2000@...il.com>
> Signed-off-by: luca abeni <luca.abeni@...tannapisa.it>
> ---

This looks all good.

While we are cleaning up stuff, maybe we could remove/update this
comment as well

https://elixir.bootlin.com/linux/v6.18-rc6/source/kernel/sched/sched.h#L334

Best,
Juri