From: Tejun Heo <tj@kernel.org>
To: luca abeni <luca.abeni@santannapisa.it>
Cc: 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,
Yuri Andriaccio <yuri.andriaccio@santannapisa.it>,
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: Mon, 11 May 2026 08:15:17 -1000 [thread overview]
Message-ID: <agIctRy2OmSMlzyO@slm.duckdns.org> (raw)
In-Reply-To: <20260511114004.0fd8d54c@luca64>
On Mon, May 11, 2026 at 11:40:04AM +0200, luca abeni wrote:
> We are discussing this issue with Yuri, and we have a doubt: if we
> disable the RT-CPU controller for a cgroup, would it be possible to
> enable it for its children?
> (In other words: if we want the RT-CPU controller to be enabled for
> some "leaf" cgroups, we need to enable it for their parents, right?)
Yeah, a cgroup has a controller available to it iff its parent enables that
controller, so all ancestors would have to enable it.
Thanks.
--
tejun
next prev parent reply other threads:[~2026-05-11 18:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260430213835.62217-1-yurand2000@gmail.com>
[not found] ` <20260430213835.62217-14-yurand2000@gmail.com>
2026-05-05 13:04 ` [RFC PATCH v5 13/29] sched/rt: Implement dl-server operations for rt-cgroups Peter Zijlstra
[not found] ` <20260430213835.62217-15-yurand2000@gmail.com>
2026-05-05 13:16 ` [RFC PATCH v5 14/29] sched/rt: Update task event callbacks for HCBS scheduling Peter Zijlstra
[not found] ` <20260430213835.62217-16-yurand2000@gmail.com>
2026-05-05 14:36 ` [RFC PATCH v5 15/29] sched/rt: Update rt-cgroup schedulability checks Peter Zijlstra
[not found] ` <20260430213835.62217-19-yurand2000@gmail.com>
2026-05-05 14:59 ` [RFC PATCH v5 18/29] sched/core: Cgroup v2 support 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
[not found] ` <20260430213835.62217-20-yurand2000@gmail.com>
2026-05-05 15:01 ` [RFC PATCH v5 19/29] sched/rt: Remove support for cgroups-v1 Peter Zijlstra
2026-05-07 15:35 ` Juri Lelli
[not found] ` <20260430213835.62217-21-yurand2000@gmail.com>
2026-05-05 15:15 ` [RFC PATCH v5 20/29] sched/deadline: Allow deeper hierarchies of RT cgroups 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 [this message]
2026-05-11 17:37 ` Tejun Heo
2026-05-07 14:30 ` luca abeni
2026-05-11 18:28 ` Tejun Heo
[not found] ` <20260430213835.62217-23-yurand2000@gmail.com>
2026-05-05 15:20 ` [RFC PATCH v5 22/29] sched/rt: Add rt-cgroup migration functions Peter Zijlstra
2026-05-05 15:24 ` Peter Zijlstra
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