linux-kernel - Re: [PATCH 1/2] cgroup, docs: Be explicit about independence of RT_GROUP

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Message-ID: <h7xbvvv3727yobsl7vx3vvcpqhdulagmogbuulp3dny4jgggym@gb3yaeuiuwa2>
Date: Wed, 5 Mar 2025 17:15:54 +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 1/2] cgroup, docs: Be explicit about independence of
 RT_GROUP_SCHED and non-cpu controllers

On Wed, Mar 05, 2025 at 01:12:43PM +0900, Shashank Balaji via B4 Relay <devnull+shashank.mahadasyam.sony.com@...nel.org> wrote:
> From: Shashank Balaji <shashank.mahadasyam@...y.com>
> 
> The cgroup v2 cpu controller has a limitation that if
> CONFIG_RT_GROUP_SCHED is enabled, the cpu controller can be enabled only
> if all the realtime processes are in the root cgroup. The other
> controllers have no such restriction. They can be used for the resource
> control of realtime processes irrespective of whether
> CONFIG_RT_GROUP_SCHED is enabled or not.
> 
> Signed-off-by: Shashank Balaji <shashank.mahadasyam@...y.com>
> ---
>  Documentation/admin-guide/cgroup-v2.rst | 23 ++++++++++++++---------
>  1 file changed, 14 insertions(+), 9 deletions(-)
> 

Acked-by: Michal Koutný <mkoutny@...e.com>

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