linux-kernel - Re: [PATCH V5 5/5] fbcon: queue work on power efficient wq

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Message-ID: <20130514175759.GK6795@mtj.dyndns.org>
Date:	Tue, 14 May 2013 10:57:59 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	davem@...emloft.net, airlied@...hat.com, axboe@...nel.dk,
	tglx@...utronix.de, peterz@...radead.org, mingo@...hat.com,
	rostedt@...dmis.org, linux-rt-users@...r.kernel.org,
	linux-kernel@...r.kernel.org, robin.randhawa@....com,
	Steve.Bannister@....com, Liviu.Dudau@....com,
	charles.garcia-tobin@....com, arvind.chauhan@....com,
	linaro-kernel@...ts.linaro.org, patches@...aro.org,
	linux-fbdev@...r.kernel.org
Subject: Re: [PATCH V5 5/5] fbcon: queue work on power efficient wq

On Wed, Apr 24, 2013 at 05:12:57PM +0530, Viresh Kumar wrote:
> fbcon uses workqueues and it has no real dependency of scheduling these on the
> cpu which scheduled them.
> 
> On a idle system, it is observed that and idle cpu wakes up many times just to
> service this work. It would be better if we can schedule it on a cpu which the
> scheduler believes to be the most appropriate one.
> 
> This patch replaces system_wq with system_power_efficient_wq.
> 
> Cc: Dave Airlie <airlied@...hat.com>
> Cc: linux-fbdev@...r.kernel.org
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Dave, applied this to wq/for-3.11.  Please holler if you want this to
be routed differently.

Thanks!

-- 
tejun
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