linux-kernel - [PATCH 0/3] cgroup/cpuset: Remove redundant rebuild_sched_domains

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Message-ID: <20241110025023.664487-1-longman@redhat.com>
Date: Sat,  9 Nov 2024 21:50:20 -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,
	Juri Lelli <juri.lelli@...hat.com>,
	Waiman Long <longman@...hat.com>
Subject: [PATCH 0/3] cgroup/cpuset: Remove redundant rebuild_sched_domains_locked() calls

The main purpose of this series is to make sure that there will
be at most one rebuild_sched_domains_locked() call per cpuset
operation. Juri found that is still not the case. Make use of the
existing cpuset_force_rebuild() helper as a replacement for a direct
rebuild_sched_domains_locked() call and check force_sd_rebuild at the
operation end.

The last patch is for removing some unnecessary v1 specific code if
CONFIG_CPUSETS_V1 isn't set.

Waiman Long (3):
  cgroup/cpuset: Revert "Allow suppression of sched domain rebuild in
    update_cpumasks_hier()"
  cgroup/cpuset: Enforce at most one rebuild_sched_domains_locked() call
    per operation
  cgroup/cpuset: Further optimize code if CONFIG_CPUSETS_V1 not set

 kernel/cgroup/cpuset.c | 121 +++++++++++++++++++++--------------------
 1 file changed, 63 insertions(+), 58 deletions(-)

-- 
2.47.0