linux-kernel - Re: [PATCH/for-next v2 1/2] cgroup/cpuset: Defer housekeeping_update() call from CPU hotplug to workqueue

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Message-ID: <c529e9e5-9ba4-454d-bec8-40f39d456ed6@redhat.com>
Date: Mon, 2 Feb 2026 19:59:48 -0500
From: Waiman Long <llong@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>, Waiman Long <llong@...hat.com>
Cc: 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>,
 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>,
 cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH/for-next v2 1/2] cgroup/cpuset: Defer
 housekeeping_update() call from CPU hotplug to workqueue

On 2/2/26 3:06 PM, Peter Zijlstra wrote:
> On Mon, Feb 02, 2026 at 09:04:57PM +0100, Peter Zijlstra wrote:
>> On Mon, Feb 02, 2026 at 01:21:43PM -0500, Waiman Long wrote:
>>
>>> Yes, I am going to remove cpuset_locked in the next version. As for
>>> __guarded_by() annotation, I need to set up a clang environment that I can
>>> use to test it before I will work on that. I usually just use gcc for my
>>> compilation need.
>> Debian experimental has clang-22, but there is also:
>>
>>    https://github.com/llvm/llvm-project/releases/tag/llvmorg-22.1.0-rc2
> Damn, copied wrong link:
>
>    https://www.kernel.org/pub/tools/llvm/files/llvm-22.1.0-rc2-x86_64.tar.xz

Thanks for the link. Will play around with that.

Cheers,
Longman

>> See: Documentation/kbuild/llvm.rst
>>