linux-kernel - Re: [patch 2/4] io controller: biocgroup implementation

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Message-Id: <20081107.131949.106618398.taka@valinux.co.jp>
Date:	Fri, 07 Nov 2008 13:19:49 +0900 (JST)
From:	Hirokazu Takahashi <taka@...inux.co.jp>
To:	kamezawa.hiroyu@...fujitsu.com
Cc:	vgoyal@...hat.com, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org, jens.axboe@...cle.com,
	ryov@...inux.co.jp, righi.andrea@...il.com, s-uchida@...jp.nec.com,
	riel@...hat.com, fernando@....ntt.co.jp, jmoyer@...hat.com,
	menage@...gle.com, ngupta@...gle.com, akpm@...ux-foundation.org,
	balbir@...ux.vnet.ibm.com
Subject: Re: [patch 2/4] io controller: biocgroup implementation

Hi,

I'm going to release a new version of bio_cgroup soon, which doesn't
have "struct list_head blist" anymore and whose overhead is minimized.

> > o biocgroup functionality.
> > o Implemented new controller "bio"
> > o Most of it picked from dm-ioband biocgroup implementation patches.
> > 
> page_cgroup implementation is changed and most of this patch needs rework.
> please see the latest one. (I think most of new characteristics are useful
> for you.)
> 
> One comment from me is
> ==
> > +struct page_cgroup {
> > +	struct list_head lru;		/* per cgroup LRU list */
> > +	struct page *page;
> > +	struct mem_cgroup *mem_cgroup;
> > +	int flags;
> > +#ifdef CONFIG_CGROUP_BIO
> > +	struct list_head blist;		/* for bio_cgroup page list */
> > +	struct bio_cgroup *bio_cgroup;
> > +#endif
> > +};
> ==
> 
> this blist is too bad. please keep this object small...
> 
> Maybe dm-ioband people will post his own new one. just making use of it is an idea.
> 
> Thanks,
> -Kame
> 
> 
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