linux-kernel - Re: [RFC PATCH 0/9] Add kernel cmdline option for rt_group

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Message-ID: <20250107194106.GB28303@noisy.programming.kicks-ass.net>
Date: Tue, 7 Jan 2025 20:41:06 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Michal Koutný <mkoutny@...e.com>
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	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: [RFC PATCH 0/9] Add kernel cmdline option for rt_group_sched

On Mon, Dec 16, 2024 at 09:12:56PM +0100, Michal Koutný wrote:
> Despite RT_GROUP_SCHED is only available on cgroup v1, there are still
> some users of this feature. General purpose distros (e.g. [1][2][3][4])
> cannot enable CONFIG_RT_GROUP_SCHED easily:

We all hate this thing and want it to go away. So not being able to use
it is a pro from where I'm at.

Sadly the replacement isn't there yet either, which makes it all really
difficult.