linux-kernel - Re: [PATCH/for-next 1/2] cgroup/cpuset: Defer housekeeping_update() call from CPU hotplug to task

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Message-ID: <6b89aa68-9b12-45f8-bb2b-29e0de67d107@redhat.com>
Date: Thu, 29 Jan 2026 20:39:26 -0500
From: Waiman Long <llong@...hat.com>
To: Chen Ridong <chenridong@...weicloud.com>, Tejun Heo <tj@...nel.org>,
 Johannes Weiner <hannes@...xchg.org>, Michal Koutný
 <mkoutny@...e.com>, Ingo Molnar <mingo@...hat.com>,
 Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>,
 Vincent Guittot <vincent.guittot@...aro.org>,
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
 Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>,
 Anna-Maria Behnsen <anna-maria@...utronix.de>,
 Frederic Weisbecker <frederic@...nel.org>,
 Thomas Gleixner <tglx@...utronix.de>, Shuah Khan <shuah@...nel.org>
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH/for-next 1/2] cgroup/cpuset: Defer housekeeping_update()
 call from CPU hotplug to task_work

On 1/29/26 8:37 PM, Waiman Long wrote:
>> The hotplug path just calls asyn_update_isolation_cpumasks(), 
>> cpuset_full_locked
>> and isolation_task_work_queued can be removed.
>>
> Thanks for the suggestions. I will adopt some of them. BTW, I am 
> switching to use workqueue instead of the task_work as the latter is 
> suitable in this use case.

Sorry, I mean "the latter is NOT suitable in this use case."

Cheers,
Longman