From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>
Cc: "Zefan Li" <lizefan.x@bytedance.com>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <shuah@kernel.org>,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
"Andrew Morton" <akpm@linux-foundation.org>,
"Roman Gushchin" <guro@fb.com>, "Phil Auld" <pauld@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Juri Lelli" <juri.lelli@redhat.com>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Marcelo Tosatti" <mtosatti@redhat.com>,
"Michal Koutný" <mkoutny@suse.com>
Subject: Re: [PATCH v11 3/8] cgroup/cpuset: Allow no-task partition to have empty cpuset.cpus.effective
Date: Sun, 12 Jun 2022 22:50:05 -0400 [thread overview]
Message-ID: <23002f21-9dfb-31b4-c6c7-86f4e292dfea@redhat.com> (raw)
In-Reply-To: <YqYlCRywdgSYtwKk@slm.duckdns.org>
On 6/12/22 13:40, Tejun Heo wrote:
> Hello,
>
> Sorry about the long delay.
>
> On Tue, May 10, 2022 at 11:34:08AM -0400, Waiman Long wrote:
>> Once a partition with empty "cpuset.cpus.effective" is formed, no
>> new task can be moved into it until "cpuset.cpus.effective" becomes
>> non-empty.
> This is always true due to no-tasks-in-intermediate-cgroups requirement,
> right?
I seems to remember there are corner cases where a task can be moved to
an intermediate cgroup under circumstances. I need to dig further to
find out what it is.
Cheers,
Longman
next prev parent reply other threads:[~2022-06-13 2:50 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-10 15:34 [PATCH v11 0/8] cgroup/cpuset: cpu partition code enhancements Waiman Long
2022-05-10 15:34 ` [PATCH v11 2/8] cgroup/cpuset: Miscellaneous cleanups & add helper functions Waiman Long
2022-05-10 15:34 ` [PATCH v11 3/8] cgroup/cpuset: Allow no-task partition to have empty cpuset.cpus.effective Waiman Long
2022-06-12 17:40 ` Tejun Heo
2022-06-12 17:41 ` Tejun Heo
2022-06-13 2:53 ` Waiman Long
2022-06-13 2:55 ` Tejun Heo
[not found] ` <YqanEZZooeZwtutA-NiLfg/pYEd1N0TnZuCh8vA@public.gmane.org>
2022-06-13 3:04 ` Waiman Long
2022-06-13 14:02 ` Michal Koutný
2022-06-13 16:47 ` Waiman Long
2022-06-13 17:23 ` Tejun Heo
2022-06-13 2:50 ` Waiman Long [this message]
[not found] ` <20220510153413.400020-1-longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2022-05-10 15:34 ` [PATCH v11 1/8] cgroup/cpuset: Add top_cpuset check in update_tasks_cpumask() Waiman Long
2022-05-10 15:34 ` [PATCH v11 4/8] cgroup/cpuset: Relax constraints to partition & cpus changes Waiman Long
2022-05-10 15:34 ` [PATCH v11 5/8] cgroup/cpuset: Add a new isolated cpus.partition type Waiman Long
2022-05-10 15:34 ` [PATCH v11 6/8] cgroup/cpuset: Show invalid partition reason string Waiman Long
2022-05-10 15:34 ` [PATCH v11 7/8] cgroup/cpuset: Update description of cpuset.cpus.partition in cgroup-v2.rst Waiman Long
2022-06-12 17:49 ` Tejun Heo
2022-06-13 3:02 ` Waiman Long
[not found] ` <404171dc-0da3-21f2-5003-9718f875e967-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2022-06-13 3:12 ` Tejun Heo
2022-06-13 13:18 ` Waiman Long
2022-06-13 17:06 ` Waiman Long
[not found] ` <YqarMyNo9oHxhZFh-NiLfg/pYEd1N0TnZuCh8vA@public.gmane.org>
2022-06-13 14:24 ` Michal Koutný
2022-06-13 17:28 ` Tejun Heo
2022-06-13 17:55 ` Michal Koutný
[not found] ` <20220613175548.GB21665-9OudH3eul5jcvrawFnH+a6VXKuFTiq87@public.gmane.org>
2022-06-13 18:00 ` Tejun Heo
[not found] ` <Yqd7WMFj6AEyV3Cy-NiLfg/pYEd1N0TnZuCh8vA@public.gmane.org>
2022-06-14 11:53 ` Michal Koutný
[not found] ` <20220614115345.GA6771-9OudH3eul5jcvrawFnH+a6VXKuFTiq87@public.gmane.org>
2022-06-27 19:10 ` Tejun Heo
2022-06-30 14:32 ` Michal Koutný
2022-06-30 22:53 ` Tejun Heo
2022-05-10 15:34 ` [PATCH v11 8/8] kselftest/cgroup: Add cpuset v2 partition root state test Waiman Long
[not found] ` <20220510153413.400020-9-longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2022-05-21 10:24 ` Muhammad Usama Anjum
2022-05-22 2:40 ` Waiman Long
2022-05-20 16:00 ` [PATCH v11 0/8] cgroup/cpuset: cpu partition code enhancements Sebastian Andrzej Siewior
2022-05-20 16:46 ` Waiman Long
2022-05-24 16:48 ` Sebastian Andrzej Siewior
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