linux-kernel - Re: [PATCH 1/2] workqueue: Move wq_update_unbound_numa() to the beginning of CPU

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Message-ID: <20160615155350.GB24102@mtj.duckdns.org>
Date:	Wed, 15 Jun 2016 11:53:50 -0400
From:	Tejun Heo <htejun@...il.com>
To:	"Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Michael Ellerman <mpe@...erman.id.au>,
	Abdul Haleem <abdhalee@...ux.vnet.ibm.com>,
	Aneesh Kumar <aneesh.kumar@...ux.vnet.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] workqueue: Move wq_update_unbound_numa() to the
 beginning of CPU_ONLINE

Hello,

On Tue, Jun 07, 2016 at 08:44:02PM +0530, Gautham R. Shenoy wrote:
> Currently in the CPU_ONLINE workqueue handler, the
> restore_unbound_workers_cpumask() will never call
> set_cpus_allowed_ptr() for a newly created unbound worker thread.

Hmmm... did you actually verify that this happens?  A new kworker
always gets bound to the cpumask that it's assigned to in
create_worker().

Thanks.

-- 
tejun