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

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Message-ID: <20250310170442.504716-11-mkoutny@suse.com>
Date: Mon, 10 Mar 2025 18:04:42 +0100
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>,
	Michal Koutný <mkoutny@...e.com>
Subject: [PATCH v2 10/10] sched: Add deprecation warning for users of RT_GROUP_SCHED

Signed-off-by: Michal Koutný <mkoutny@...e.com>
---
 kernel/sched/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 4b2d9ec0c1f23..6866355046d21 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9748,6 +9748,7 @@ static int cpu_cfs_local_stat_show(struct seq_file *sf, void *v)
 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");
 	return sched_group_set_rt_runtime(css_tg(css), val);
 }
 
-- 
2.48.1