linux-kernel - Re: [PATCH-wq v3 0/4] workqueue: Enable unbound cpumask update on ordered workqueues

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Message-ID: <ZcF3qmion7H6qyYY@slm.duckdns.org>
Date: Mon, 5 Feb 2024 14:04:58 -1000
From: Tejun Heo <tj@...nel.org>
To: Waiman Long <longman@...hat.com>
Cc: Lai Jiangshan <jiangshanlai@...il.com>, linux-kernel@...r.kernel.org,
	Juri Lelli <juri.lelli@...hat.com>,
	Cestmir Kalina <ckalina@...hat.com>,
	Alex Gladkov <agladkov@...hat.com>, Phil Auld <pauld@...hat.com>,
	Costa Shulyupin <cshulyup@...hat.com>
Subject: Re: [PATCH-wq v3 0/4] workqueue: Enable unbound cpumask update on
 ordered workqueues

On Mon, Feb 05, 2024 at 09:53:09AM -1000, Tejun Heo wrote:
> On Mon, Feb 05, 2024 at 02:45:58PM -0500, Waiman Long wrote:
> >  v3:
> >   - [v2] https://lore.kernel.org/lkml/20240203154334.791910-1-longman@redhat.com/
> >   - Drop patch 1 as it has been merged into the for-6.9 branch.
> >   - Use rcu_access_pointer() to access wq->dfl_pwq.
> >   - Use RCU protection instead of acquiring wq->mutex in
> >     apply_wqattrs_cleanup().
> 
> Looks like we raced each other. I'll wait for v4.

BTW, please don't bother to handle __WQ_ORDERED being cleared. We are very
close to removing the implicit ORDERED promotion, so we should be able to
apply the patch to remove the distinction between explicitly and implicitly
ordered workqueues.

Thanks.

-- 
tejun