linux-kernel - Re: [PATCH v2 10/10] sched: Add deprecation warning for users of RT_GROUP

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Message-ID: <pgbl3anqsqo7a3of7lyml4ynzf5jbpmgm23uokiw77x6qf3jc5@bhh5lvbnndkp>
Date: Fri, 2 May 2025 16:48:12 +0200
From: Michal Koutný <mkoutny@...e.com>
To: Peter Zijlstra <peterz@...radead.org>, cgroups@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>, 
	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>, Frederic Weisbecker <fweisbecker@...e.com>
Subject: Re: [PATCH v2 10/10] sched: Add deprecation warning for users of
 RT_GROUP_SCHED

Hello Peter.

On Thu, Apr 17, 2025 at 02:13:25PM +0200, Michal Koutný <mkoutny@...e.com> wrote:
> On Mon, Mar 10, 2025 at 06:04:42PM +0100, Michal Koutný <mkoutny@...e.com> wrote:
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> ...
> >  static int cpu_rt_runtime_write(struct cgroup_subsys_state *css,
> >                                 struct cftype *cft, s64 val)
> > {
> > +	pr_warn_once("RT_GROUP throttling is deprecated, use global sched_rt_runtime_us and deadline tasks.\n");
> 
> I just noticed that this patch isn't picked together with the rest of
> the series in tip/sched/core.
> Did it slip through the cracks (as the last one) or is that intentional
> for some reason?

I'm still wondering about this so that the users get right (or no)
message.

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