linux-kernel - Re: [PATCH 17/18] io-controller: IO group refcounting support

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Message-ID: <4A03A013.9000405@cn.fujitsu.com>
Date:	Fri, 08 May 2009 10:59:31 +0800
From:	Gui Jianfeng <guijianfeng@...fujitsu.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com,
	mikew@...gle.com, fchecconi@...il.com, paolo.valente@...more.it,
	jens.axboe@...cle.com, ryov@...inux.co.jp, fernando@....ntt.co.jp,
	s-uchida@...jp.nec.com, taka@...inux.co.jp, jmoyer@...hat.com,
	dhaval@...ux.vnet.ibm.com, balbir@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, righi.andrea@...il.com,
	agk@...hat.com, dm-devel@...hat.com, snitzer@...hat.com,
	m-ikeda@...jp.nec.com, akpm@...ux-foundation.org
Subject: Re: [PATCH 17/18] io-controller: IO group refcounting support

Vivek Goyal wrote:
...
>  
> -		BUG_ON(!RB_EMPTY_ROOT(&st->active));
> -		BUG_ON(!RB_EMPTY_ROOT(&st->idle));
>  	}
>  
> -	BUG_ON(iog->sched_data.next_active != NULL);
> -	BUG_ON(iog->sched_data.active_entity != NULL);
> -	BUG_ON(entity->tree != NULL);
> +	/* Drop iocg reference on io group */

  We'd better to reset iog->iocg_id here since the cgroup is going to destroy.

> +	elv_put_iog(iog);
>  }
>  
> -/**


-- 
Regards
Gui Jianfeng


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