linux-kernel - [cgroup/for-6.19 PATCH v3 0/5] cgroup/cpuset: Additional housekeeping check & cleanup

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Message-ID: <20251105043848.382703-1-longman@redhat.com>
Date: Tue,  4 Nov 2025 23:38:43 -0500
From: Waiman Long <longman@...hat.com>
To: Tejun Heo <tj@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Koutný <mkoutny@...e.com>
Cc: cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chen Ridong <chenridong@...wei.com>,
	Gabriele Monaco <gmonaco@...hat.com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Waiman Long <longman@...hat.com>
Subject: [cgroup/for-6.19 PATCH v3 0/5] cgroup/cpuset: Additional housekeeping check & cleanup

 v3: Break out the prstate_housekeeping_conflict() change into 2
     new patches with some testing result included.

 v2: Update patch 2 to correct some of the checking code and add
     prstate_housekeeping_conflict() as suggested by Chen Ridong.

The first two patches are based on the two cpuset patches from the
"timers: Exclude isolated cpus from timer migration" patch series [1]
with some modifications. They add additional nohz_full housekeeping
mask check to ensure that there is at least one common housekeeping
CPU that is not domain and nohz_full isolated.

Patches 3 & 4 fix another housekeeping CPU conflict issue reported by
Chen Ridong.

The last patch is another cleanup patch to simplify the current
partition code.

[1] https://lore.kernel.org/lkml/20251020112802.102451-1-gmonaco@redhat.com/

Gabriele Monaco (1):
  cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to
    update_isolation_cpumasks()

Waiman Long (4):
  cgroup/cpuset: Fail if isolated and nohz_full don't leave any
    housekeeping
  cgroup/cpuset: Move up prstate_housekeeping_conflict() helper
  cgroup/cpuset: Ensure domain isolated CPUs stay in root or isolated
    partition
  cgroup/cpuset: Globally track isolated_cpus update

 kernel/cgroup/cpuset.c | 189 ++++++++++++++++++++++++++++-------------
 1 file changed, 130 insertions(+), 59 deletions(-)

-- 
2.51.1