linux-kernel - Re: [PATCH] block: make CONFIG_BLK

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Message-ID: <4B9EE0A9.5010901@cn.fujitsu.com>
Date:	Tue, 16 Mar 2010 09:36:41 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	Jens Axboe <jens.axboe@...cle.com>,
	Gui Jianfeng <GuiJianfeng@...fujitsu.com>,
	Ben Blum <bblum@...rew.cmu.edu>,
	LKML <linux-kernel@...r.kernel.org>,
	"containers@...ts.osdl.org" <containers@...ts.osdl.org>
Subject: Re: [PATCH] block: make CONFIG_BLK_CGROUP visible

>>  	---help---
>>  	Generic block IO controller cgroup interface. This is the common
>> @@ -91,7 +92,7 @@ config BLK_CGROUP
>>  	to such task groups.
>>  
>>  config DEBUG_BLK_CGROUP
>> -	bool
>> +	bool "Block cgroup debugging help"
> 
> 
> Why are you making DEBUG_BLK_CGROUP this as a user visible/configurable
> option? This is already controlled by DEBUG_CFQ_IOSCHED. If you don't want
> the DEBUG overhead, just set DEBUG_CFQ_IOSCHED=n and DEBUG_BLK_CGROUP will
> not be selected? Making it user visible does not seem to be buying us
> anything?
> 

Sounds reasonable. A minor question, since DEBUG_BLK_CGROUP is not
visible, the help message for this config is not visible too, so we
still keep it?
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