From: Peter Zijlstra <peterz@infradead.org>
To: "Michal Koutný" <mkoutny@suse.com>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
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>,
Frederic Weisbecker <fweisbecker@suse.com>
Subject: Re: [PATCH v2 06/10] sched: Bypass bandwitdh checks with runtime disabled RT_GROUP_SCHED
Date: Wed, 2 Apr 2025 14:02:21 +0200 [thread overview]
Message-ID: <20250402120221.GI25239@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20250310170442.504716-7-mkoutny@suse.com>
On Mon, Mar 10, 2025 at 06:04:38PM +0100, Michal Koutný wrote:
> When RT_GROUPs are compiled but not exposed, their bandwidth cannot
> be configured (and it is not initialized for non-root task_groups neither).
> Therefore bypass any checks of task vs task_group bandwidth.
>
> This will achieve behavior very similar to setups that have
> !CONFIG_RT_GROUP_SCHED and attach cpu controller to cgroup v2 hierarchy.
> (On a related note, this may allow having RT tasks with
> CONFIG_RT_GROUP_SCHED and cgroup v2 hierarchy.)
Can we make it so that cgroup-v2 is explicitly disallowed for now? As I
said earlier, we're looking at a new implemention with a incompatible
interface.
next prev parent reply other threads:[~2025-04-02 12:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-10 17:04 [PATCH v2 00/10] Add kernel cmdline option for rt_group_sched Michal Koutný
2025-03-10 17:04 ` [PATCH v2 01/10] sched: Convert CONFIG_RT_GROUP_SCHED macros to code conditions Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 02/10] sched: Remove unneeed macro wrap Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 03/10] sched: Always initialize rt_rq's task_group Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 04/10] sched: Add commadline option for RT_GROUP_SCHED toggling Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 05/10] sched: Skip non-root task_groups with disabled RT_GROUP_SCHED Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 06/10] sched: Bypass bandwitdh checks with runtime " Michal Koutný
2025-04-02 12:02 ` Peter Zijlstra [this message]
2025-04-03 12:20 ` Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 07/10] sched: Do not construct nor expose RT_GROUP_SCHED structures if disabled Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 08/10] sched: Add RT_GROUP WARN checks for non-root task_groups Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 09/10] sched: Add annotations to RT_GROUP_SCHED fields Michal Koutný
2025-04-08 19:05 ` [tip: sched/core] " tip-bot2 for Michal Koutný
2025-03-10 17:04 ` [PATCH v2 10/10] sched: Add deprecation warning for users of RT_GROUP_SCHED Michal Koutný
2025-04-17 12:13 ` Michal Koutný
2025-05-02 14:48 ` Michal Koutný
2025-03-24 18:10 ` [PATCH v2 00/10] Add kernel cmdline option for rt_group_sched Michal Koutný
2025-04-01 11:05 ` Peter Zijlstra
2025-04-03 12:17 ` Michal Koutný
2025-04-07 5:57 ` Juri Lelli
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