linux-kernel - Re: [PATCH 2/2] cgroup, docs: Document interaction of RT processes with cpu controller

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Message-ID: <thhej7ngafu6ivtpcjs2czjidd5xqwihvrgqskvcrd3w65fnp4@inmu3wuofcpr>
Date: Wed, 5 Mar 2025 17:19:47 +0100
From: Michal Koutný <mkoutny@...e.com>
To: shashank.mahadasyam@...y.com
Cc: Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>, 
	Jonathan Corbet <corbet@....net>, Waiman Long <longman@...hat.com>, cgroups@...r.kernel.org, 
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Shinya Takumi <shinya.takumi@...y.com>
Subject: Re: [PATCH 2/2] cgroup, docs: Document interaction of RT processes
 with cpu controller

Hello Shashank.

On Wed, Mar 05, 2025 at 01:12:44PM +0900, Shashank Balaji via B4 Relay <devnull+shashank.mahadasyam.sony.com@...nel.org> wrote:
> From: Shashank Balaji <shashank.mahadasyam@...y.com>
> 
> If the cpu controller is enabled in a CONFIG_RT_GROUP_SCHED
> disabled setting, cpu.stat and cpu.pressure account for realtime
> processes, and cpu.uclamp.{min, max} affect realtime processes as well.
> None of the other interface files are affected by or affect realtime
> processes.

I'm not sure the changed formulation make it clearer.
What was the unexpected value with !CONFIG_RT_GROUP_SCHED that made you
change this docs?

(Please note the docs is for generic cgroup, not only root cgroup.)

Michal

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