linux-kernel - Re: [PATCH 3/5] workqueue: Create low-level unbound workqueues cpumask

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Message-ID: <20140516190042.GJ5379@htj.dyndns.org>
Date:	Fri, 16 May 2014 15:00:42 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Kevin Hilman <khilman@...aro.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Mike Galbraith <bitbucket@...ine.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [PATCH 3/5] workqueue: Create low-level unbound workqueues
 cpumask

On Fri, May 16, 2014 at 01:52:48PM -0500, Christoph Lameter wrote:
> On Fri, 16 May 2014, Tejun Heo wrote:
> 
> > On Fri, May 16, 2014 at 12:52:26PM -0500, Christoph Lameter wrote:
> > > On Fri, 16 May 2014, Frederic Weisbecker wrote:
> > >
> > > > 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_unbounds file.
> > >
> > > Why is there "virtual" directory in the path? Workqueues are "virtual"
> > > devices?
> >
> > I ain't an actual one.  That apparently is the preferred place to
> > present software constructs like workqueues in sysfs.
> 
> Could we fix that? A workqueue is not a device but more a kernel setting.
> 
> /sys/kernel/workqueue/.... ?

Right, that could have been more in line with slab files.  It's
already too late tho.  This has been exposed for quite a while now.
Urgh...

Thanks.

-- 
tejun
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