linux-kernel - Re: [PATCH 00/10] workqueue: break affinity initiatively

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Message-ID: <X9oZ79F+xB7NMsUt@mtj.duckdns.org>
Date:   Wed, 16 Dec 2020 09:30:07 -0500
From:   Tejun Heo <tj@...nel.org>
To:     Lai Jiangshan <jiangshanlai@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Hillf Danton <hdanton@...a.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Qian Cai <cai@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Vincent Donnefort <vincent.donnefort@....com>
Subject: Re: [PATCH 00/10] workqueue: break affinity initiatively

On Mon, Dec 14, 2020 at 11:54:47PM +0800, Lai Jiangshan wrote:
> From: Lai Jiangshan <laijs@...ux.alibaba.com>
> 
> 06249738a41a ("workqueue: Manually break affinity on hotplug")
> said that scheduler will not force break affinity for us.
> 
> But workqueue highly depends on the old behavior. Many parts of the codes
> relies on it, 06249738a41a ("workqueue: Manually break affinity on hotplug")
> is not enough to change it, and the commit has flaws in itself too.
> 
> We need to thoroughly update the way workqueue handles affinity
> in cpu hot[un]plug, what is this patchset intends to do and
> replace the Valentin Schneider's patch [1].
> 
> Patch 1 fixes a flaw reported by Hillf Danton <hdanton@...a.com>.
> I have to include this fix because later patches depends on it.
> 
> The patchset is based on tip/master rather than workqueue tree,
> because the patchset is a complement for 06249738a41a ("workqueue:
> Manually break affinity on hotplug") which is only in tip/master by now.
> 
> [1]: https://lore.kernel.org/r/ff62e3ee994efb3620177bf7b19fab16f4866845.camel@redhat.com

Generally looks good to me. Please feel free to add

 Acked-by: Tejun Heo <tj@...nel.org>

and route the series through tip.

Thanks.

-- 
tejun