From: Tejun Heo <tj@kernel.org>
To: Waiman Long <longman@redhat.com>
Cc: Zefan Li <lizefan.x@bytedance.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Jonathan Corbet <corbet@lwn.net>,
cgroups@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, Brent Rowsell <browsell@redhat.com>,
Mrunal Patel <mpatel@redhat.com>, Peter Hunt <pehunt@redhat.com>
Subject: Re: [PATCH] cgroup, docs: Clarify limitation of RT processes with cgroup v2 cpu controller
Date: Mon, 25 Mar 2024 10:10:59 -1000 [thread overview]
Message-ID: <ZgHaUyeIcS0w_udY@slm.duckdns.org> (raw)
In-Reply-To: <20240320142302.1790171-1-longman@redhat.com>
On Wed, Mar 20, 2024 at 10:23:02AM -0400, Waiman Long wrote:
> The limitation that all RT processes have to be in the root cgroup
> before enabling cpu controller only applies if the CONFIG_RT_GROUP_SCHED
> option is enabled in the running kernel. If a kernel does not have
> CONFIG_RT_GROUP_SCHED enabled, RT processes can exist in a non-root
> cgroup even when cpu controller is enabled. CPU sharing of RT processes
> will not be under cgroup control, but other resources like memory can be.
>
> Clarify this limitation to avoid confusion to users that are using
> cgroup v2.
>
> Signed-off-by: Waiman Long <longman@redhat.com>
Applied to cgroup/for-6.10.
Thanks.
--
tejun
prev parent reply other threads:[~2024-03-25 20:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-20 14:23 [PATCH] cgroup, docs: Clarify limitation of RT processes with cgroup v2 cpu controller Waiman Long
2024-03-25 20:10 ` Tejun Heo [this message]
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