Received-SPF: pass (google.com: domain of linux-kernel+bounces-135761-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
Sender: Tejun Heo <htejun@gmail.com>
Date: Mon, 8 Apr 2024 07:40:33 -1000
From: Tejun Heo <tj@kernel.org>
To: Waiman Long <longman@redhat.com>
Cc: Zefan Li <lizefan.x@bytedance.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
	Shuah Khan <shuah@kernel.org>, linux-kernel@vger.kernel.org,
	cgroups@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-kselftest@vger.kernel.org,
	Frederic Weisbecker <frederic@kernel.org>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Valentin Schneider <vschneid@redhat.com>,
	Anna-Maria Behnsen <anna-maria@linutronix.de>,
	Alex Shi <alexs@kernel.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Michal =?iso-8859-1?Q?Koutn=FD?= <mkoutny@suse.com>
Subject: Re: [PATCH v2 0/2] cgroup/cpuset: Make cpuset hotplug processing
 synchronous
Message-ID: <ZhQsESPi9PwpPhx7@slm.duckdns.org>
References: <20240404134749.2857852-1-longman@redhat.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240404134749.2857852-1-longman@redhat.com>

On Thu, Apr 04, 2024 at 09:47:47AM -0400, Waiman Long wrote:
>  v2:
>   - Found that rebuild_sched_domains() has external callers, revert its
>     change and introduce rebuild_sched_domains_cpuslocked() instead.
> 
> As discussed in the LKML thread [1], the asynchronous nature of cpuset
> hotplug handling code is causing problem with RCU testing. With recent
> changes in the way locking is being handled in the cpuset code, it is
> now possible to make the cpuset hotplug code synchronous again without
> major changes.
> 
> This series enables the hotplug code to call directly into cpuset hotplug
> core without indirection with the exception of the special case of v1
> cpuset becoming empty still being handled indirectly with workqueue.
> 
> A new simple test case was also written to test this special v1 cpuset
> case. The test_cpuset_prs.sh script was also run with LOCKDEP on to
> verify that there is no regression.

Applied to cgroup/for-6.10. Hopefully, this one will work out. Thanks for
working on this.

-- 
tejun