linux-kernel - Re: [RFC 3/4] workqueue: reap dead pool workqueue on queuing work

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Message-ID: <20191211232504.ih7ms7pwymzeaiym@ca-dmjordan1.us.oracle.com>
Date:   Wed, 11 Dec 2019 18:25:04 -0500
From:   Daniel Jordan <daniel.m.jordan@...cle.com>
To:     Hillf Danton <hdanton@...a.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>, Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: [RFC 3/4] workqueue: reap dead pool workqueue on queuing work

On Wed, Dec 11, 2019 at 07:22:29PM +0800, Hillf Danton wrote:
> Release rcu lock to reap dead pool workqueue.

What's to be gained by reaping the pwq (and possibly worker pool and wq) before
__queue_work() retries?  It'll just happen after the queueing finishes.