From: Waiman Long <llong@redhat.com>
To: Pingfan Liu <piliu@redhat.com>, Juri Lelli <juri.lelli@redhat.com>
Cc: "Waiman Long" <llong@redhat.com>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
"Peter Zijlstra" <peterz@infradead.org>,
"Pierre Gondois" <pierre.gondois@arm.com>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>, "Tejun Heo" <tj@kernel.org>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.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>
Subject: Re: [PATCHv4 2/2] sched/deadline: Walk up cpuset hierarchy to decide root domain when hot-unplug
Date: Mon, 3 Nov 2025 22:42:05 -0500 [thread overview]
Message-ID: <5d755e54-ff86-4cd0-87bf-86290d4f13de@redhat.com> (raw)
In-Reply-To: <aQl0P90Q7X7fG5q-@fedora>
On 11/3/25 10:34 PM, Pingfan Liu wrote:
>> If that is the case, and assuming nobody touched the sleeping task
>> affinity (p->cpus_ptr), can't we just use another online cpu from
> In fact, IIUC, the change will be always propagated through the cpuset
> hier into cpus_ptr by cpuset_update_tasks_cpumask() in cpuset v2.
> (Ridong, please correct me if my understanding is wrong)
For kthreads, changes to p->cpus_ptr via cpuset is going to be updated
with a new set of kthread patch [1] being reviewed right now.
[1] https://lore.kernel.org/lkml/20251013203146.10162-1-frederic@kernel.org/
Cheers,
Longman
next prev parent reply other threads:[~2025-11-04 3:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-28 3:43 [PATCHv4 1/2] sched/isolation: Split out the housekeeping part Pingfan Liu
2025-10-28 3:43 ` [PATCHv4 2/2] sched/deadline: Walk up cpuset hierarchy to decide root domain when hot-unplug Pingfan Liu
2025-10-29 2:37 ` Chen Ridong
2025-10-29 11:18 ` Pingfan Liu
2025-10-30 6:44 ` Chen Ridong
2025-10-30 10:45 ` Pingfan Liu
2025-10-31 0:47 ` Chen Ridong
2025-10-31 14:21 ` Pingfan Liu
2025-11-03 3:17 ` Pingfan Liu
2025-10-29 15:31 ` Waiman Long
2025-10-30 10:41 ` Pingfan Liu
2025-11-03 13:50 ` Juri Lelli
2025-11-04 3:34 ` Pingfan Liu
2025-11-04 3:42 ` Waiman Long [this message]
2025-11-05 2:23 ` Chen Ridong
2025-11-05 7:11 ` Pingfan Liu
2025-10-29 14:56 ` [PATCHv4 1/2] sched/isolation: Split out the housekeeping part Waiman Long
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