From: Tejun Heo <tj@kernel.org>
To: Yuri Andriaccio <yuri.andriaccio@santannapisa.it>
Cc: luca abeni <luca.abeni@santannapisa.it>,
Peter Zijlstra <peterz@infradead.org>,
Yuri Andriaccio <yurand2000@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
linux-kernel@vger.kernel.org, hannes@cmpxchg.org,
mkoutny@suse.com, cgroups@vger.kernel.org
Subject: Re: [RFC PATCH v5 20/29] sched/deadline: Allow deeper hierarchies of RT cgroups
Date: Tue, 12 May 2026 08:20:50 -1000 [thread overview]
Message-ID: <agNvghphiv9sCJrq@slm.duckdns.org> (raw)
In-Reply-To: <b549b3cb062f2823ba6d4723b7b9260b@kernel.org>
On Tue, May 12, 2026 at 08:19:02AM -1000, Tejun Heo wrote:
> How is a delegated subtree prevented from setting cpu.rt.min = 'root' and
> escaping its ancestors' cpu.rt.max budget?
Hmm.. I guess the same problem exists w/ separate rt controller too. If the
users on the system already started using rt, how do you enable the
controller from the top down with budgets already being used down in the
hierarchy?
Thanks.
--
tejun
next prev parent reply other threads:[~2026-05-12 18:20 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 21:38 [RFC PATCH v5 00/29] Hierarchical Constant Bandwidth Server Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 01/29] sched/deadline: Fix replenishment logic for non-deferred servers Yuri Andriaccio
2026-05-20 8:34 ` [tip: sched/core] " tip-bot2 for Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 02/29] sched/deadline: Do not access dl_se->rq directly Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 03/29] sched/deadline: Distinguish between dl_rq and my_q Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 04/29] sched/rt: Pass an rt_rq instead of an rq where needed Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 05/29] sched/rt: Move functions from rt.c to sched.h Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 06/29] sched/rt: Disable RT_GROUP_SCHED Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 07/29] sched/rt: Remove unnecessary runqueue pointer in struct rt_rq Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 08/29] sched/rt: Introduce HCBS specific structs in task_group Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 09/29] sched/core: Initialize HCBS specific structures Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 10/29] sched/deadline: Add dl_init_tg Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 11/29] sched/rt: Add {alloc/unregister/free}_rt_sched_group Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 12/29] sched/deadline: Account rt-cgroups bandwidth in deadline tasks schedulability tests Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 13/29] sched/rt: Implement dl-server operations for rt-cgroups Yuri Andriaccio
2026-05-05 13:04 ` Peter Zijlstra
2026-04-30 21:38 ` [RFC PATCH v5 14/29] sched/rt: Update task event callbacks for HCBS scheduling Yuri Andriaccio
2026-05-05 13:16 ` Peter Zijlstra
2026-04-30 21:38 ` [RFC PATCH v5 15/29] sched/rt: Update rt-cgroup schedulability checks Yuri Andriaccio
2026-05-05 14:36 ` Peter Zijlstra
2026-04-30 21:38 ` [RFC PATCH v5 16/29] sched/rt: Allow zeroing the runtime of the root control group Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 17/29] sched/rt: Remove old RT_GROUP_SCHED data structures Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 18/29] sched/core: Cgroup v2 support Yuri Andriaccio
2026-05-05 14:59 ` Peter Zijlstra
2026-05-06 19:58 ` luca abeni
2026-05-07 7:01 ` Peter Zijlstra
2026-05-07 13:30 ` luca abeni
2026-05-07 14:16 ` Peter Zijlstra
2026-04-30 21:38 ` [RFC PATCH v5 19/29] sched/rt: Remove support for cgroups-v1 Yuri Andriaccio
2026-05-05 15:01 ` Peter Zijlstra
2026-05-07 15:35 ` Juri Lelli
2026-05-13 12:15 ` Yuri Andriaccio
2026-05-13 14:37 ` Juri Lelli
2026-04-30 21:38 ` [RFC PATCH v5 20/29] sched/deadline: Allow deeper hierarchies of RT cgroups Yuri Andriaccio
2026-05-05 15:15 ` Peter Zijlstra
2026-05-05 19:56 ` Tejun Heo
2026-05-07 10:53 ` Peter Zijlstra
2026-05-07 15:03 ` Juri Lelli
2026-05-07 15:05 ` Peter Zijlstra
2026-05-07 16:39 ` luca abeni
2026-05-11 9:29 ` Juri Lelli
2026-05-11 17:52 ` Tejun Heo
2026-05-07 16:44 ` luca abeni
2026-05-11 9:40 ` luca abeni
2026-05-11 18:15 ` Tejun Heo
2026-05-11 17:37 ` Tejun Heo
2026-05-07 14:30 ` luca abeni
2026-05-11 18:28 ` Tejun Heo
2026-05-12 17:38 ` Yuri Andriaccio
2026-05-12 18:19 ` Tejun Heo
2026-05-12 18:20 ` Tejun Heo [this message]
2026-05-13 12:08 ` Yuri Andriaccio
2026-05-13 19:10 ` Tejun Heo
2026-05-14 7:25 ` luca abeni
2026-05-14 22:20 ` Tejun Heo
2026-05-18 15:27 ` Yuri Andriaccio
2026-05-18 18:47 ` Tejun Heo
2026-05-19 21:02 ` [BULK] " luca abeni
2026-05-20 18:49 ` Tejun Heo
2026-04-30 21:38 ` [RFC PATCH v5 21/29] sched/rt: Update default bandwidth for real-time tasks to ONE Yuri Andriaccio
2026-05-20 8:34 ` [tip: sched/core] " tip-bot2 for Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 22/29] sched/rt: Add rt-cgroup migration functions Yuri Andriaccio
2026-05-05 15:20 ` Peter Zijlstra
2026-05-05 15:24 ` Peter Zijlstra
2026-04-30 21:38 ` [RFC PATCH v5 23/29] sched/rt: Hook HCBS " Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 24/29] sched/core: Execute enqueued balance callbacks when changing allowed CPUs Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 25/29] sched/rt: Try pull task on empty server pick Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 26/29] sched/core: Execute enqueued balance callbacks after migrate_disable_switch Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 27/29] Documentation: Update documentation for real-time cgroups Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 28/29] sched/rt: Add debug BUG_ONs for pre-migration code Yuri Andriaccio
2026-04-30 21:38 ` [RFC PATCH v5 29/29] sched/rt: Add debug BUG_ONs in migration code Yuri Andriaccio
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