From:   Waiman Long <longman@redhat.com>
To:     Tejun Heo <tj@kernel.org>, Zefan Li <lizefan.x@bytedance.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Will Deacon <will@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>
Cc:     linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
        kernel-team@android.com, Waiman Long <longman@redhat.com>
Subject: [PATCH v2 0/2] cgroup/cpuset: Make hotplug code more efficient
Date:   Thu,  2 Feb 2023 09:31:58 -0500
Message-Id: <20230202143200.128753-1-longman@redhat.com>
MIME-Version: 1.0
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 v2:
  - It turns out it works around the v1 cpuset missing offline cpu
    problem better than I originally thought. So the patch description
    is updated accordingly.

This small patch series makes the cpuset hotplug a bit more efficient
by eliminating unnecessary task iteration and cpu/node masks update
when a cpu hotplug event (online/offline) happens.

It can also largely work around the known problem of missing previously
offlined cpus in v1 cpuset with some exceptions.

Waiman Long (2):
  cgroup/cpuset: Skip task update if hotplug doesn't affect current
    cpuset
  cgroup/cpuset: Don't update tasks' cpumasks for cpu offline events

 kernel/cgroup/cpuset.c | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

-- 
2.31.1