linux-kernel - Re: [PATCH] sched/rt: Remove empty sched_rt_do

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Message-ID: <241df8e3-08a7-493a-b28e-f1770b1bd122@amd.com>
Date: Wed, 11 Feb 2026 13:55:12 +0530
From: K Prateek Nayak <kprateek.nayak@....com>
To: Zhan Xusheng <zhanxusheng1024@...il.com>, Peter Zijlstra
	<peterz@...radead.org>
CC: Juri Lelli <juri.lelli@...hat.com>, <linux-kernel@...r.kernel.org>, Zhan
 Xusheng <zhanxusheng@...omi.com>, Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] sched/rt: Remove empty sched_rt_do_global() helper

(+Steve)

Hello Zhan,

On 2/11/2026 12:41 PM, Zhan Xusheng wrote:
> sched_rt_do_global() is an empty helper that has no effect on
> RT bandwidth sysctl handling.
> 
> Historically, sched_rt_do_global() was responsible for managing
> RT throttling parameters before the introduction of the fair
> server. Since commit 5f6bd380c7bd ("sched/rt: Remove default
> bandwidth control"), the function became obsolete, but the empty
> helper and its call site were retained.
> 
> Remove the unused function and its call site to simplify the
> sysctl update path.
> 
> No functional change intended.
> 
> Reviewed-by: K Prateek Nayak <kprateek.nayak@....com>
> Signed-off-by: Zhan Xusheng <zhanxusheng@...omi.com>

I believe there is another competing cleanup by Michal at
https://lore.kernel.org/lkml/20260119-sched-rert_groups-v1-0-80c1e5269910@suse.com/
which is doing a little bit more.

I'll leave it to Peter / Steve to pick which one they prefer.

-- 
Thanks and Regards,
Prateek