linux-kernel - Re: Re: Re: Re: Re: [PATCH v4 11/18] input: Add initial support for TWL6040 vibrator

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Message-ID: <20110615082301.GN8141@htj.dyndns.org>
Date:	Wed, 15 Jun 2011 10:23:01 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Péter Ujfalusi <peter.ujfalusi@...com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"Girdwood, Liam" <lrg@...com>, Tony Lindgren <tony@...mide.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"Lopez Cruz, Misael" <misael.lopez@...com>
Subject: Re: Re: Re: Re: Re: [PATCH v4 11/18] input: Add initial support for
 TWL6040 vibrator

On Wed, Jun 15, 2011 at 10:18:58AM +0200, Tejun Heo wrote:
> No human being can feel 120usec difference and I can't see how using
> HIGHPRI is justified here (which is what the code is doing
> _accidentally_ by using singlethread_workqueue).

Ooh, one more thing, and even if you insist on using HIGHPRI (please
don't), you don't need to create workqueue for each device.  You can
just create one for the whole driver in init and destroy it from exit.
What matters is the HIGHPRI attribute of the workqueue.  The number of
workqueues is completely irrelevant.

Thank you.

-- 
tejun
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