linux-kernel - Re: [PATCH 2/3 V8] workqueue: Create low-level unbound workqueues cpumask

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Message-ID: <20150427154546.GD1499@htj.duckdns.org>
Date:	Mon, 27 Apr 2015 11:45:46 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Kevin Hilman <khilman@...aro.org>,
	Mike Galbraith <bitbucket@...ine.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [PATCH 2/3 V8] workqueue: Create low-level unbound workqueues
 cpumask

On Mon, Apr 27, 2015 at 05:58:39PM +0800, Lai Jiangshan wrote:
> From: Frederic Weisbecker <fweisbec@...il.com>
> 
> Create a cpumask that limit the affinity of all unbound workqueues.
> This cpumask is controlled though a file at the root of the workqueue
> sysfs directory.
> 
> It works on a lower-level than the per WQ_SYSFS workqueues cpumask files
> such that the effective cpumask applied for a given unbound workqueue is
> the intersection of /sys/devices/virtual/workqueue/$WORKQUEUE/cpumask and
> the new /sys/devices/virtual/workqueue/cpumask file.
> 
> This patch implements the basic infrastructure and the read interface.
> wq_unbound_cpumask is initially set to cpu_possible_mask.
> 
> Cc: Christoph Lameter <cl@...ux.com>
> Cc: Kevin Hilman <khilman@...aro.org>
> Cc: Lai Jiangshan <laijs@...fujitsu.com>
> Cc: Mike Galbraith <bitbucket@...ine.de>
> Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Viresh Kumar <viresh.kumar@...aro.org>
> Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>

Applied 1-2 to wq/for-4.2 w/ minor comment updates.

Thanks.

-- 
tejun
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