linux-kernel - Re: [PATCH V4 3/4] block: queue work on unbound wq

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Date:	Tue, 9 Apr 2013 15:05:16 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Amit Kucheria <amit.kucheria@...aro.org>
Cc:	Tejun Heo <tj@...nel.org>, Jens Axboe <axboe@...nel.dk>,
	Robin Randhawa <robin.randhawa@....com>,
	linux-rt-users@...r.kernel.org,
	Patch Tracking <patches@...aro.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Liviu Dudau <Liviu.Dudau@....com>,
	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Steve Bannister <Steve.Bannister@....com>, airlied@...hat.com,
	Arvind Chauhan <arvind.chauhan@....com>, mingo@...hat.com,
	davem@...emloft.net,
	Charles Garcia-Tobin <charles.garcia-tobin@....com>
Subject: Re: [PATCH V4 3/4] block: queue work on unbound wq

On 9 April 2013 14:48, Amit Kucheria <amit.kucheria@...aro.org> wrote:
> On Tue, Apr 9, 2013 at 1:00 PM, Viresh Kumar <viresh.kumar@...aro.org> wrote:

>> diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
>> +config WQ_POWER_EFFICIENT
>> +       bool "Workqueue allocated as UNBOUND for power efficiency"
>> +       depends on PM
>
> Should default to N so that existing configs don't get prompted for a choice.

I thought defaults default is N if not present. I can add default n if
it is required.

>> diff --git a/kernel/workqueue.c b/kernel/workqueue.c
>> +static bool wq_power_efficient = 0;
>
> 1?

It should be disabled by default even if CONFIG_WQ_POWER_EFFICIENT is
selected and so initialized it with zero.. Though i don't need to
initialize it as
default is 0.
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