linux-kernel - Re: [PATCH 6/7] bio-cgroup: Implement the bio-cgroup

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Date:	Fri, 08 Aug 2008 17:30:45 +0900 (JST)
From:	Ryo Tsuruta <ryov@...inux.co.jp>
To:	yoshikawa.takuya@....ntt.co.jp
Cc:	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org,
	xen-devel@...ts.xensource.com, agk@...rceware.org
Subject: Re: [PATCH 6/7] bio-cgroup: Implement the bio-cgroup

Hi Yoshikawa-san,

> > +static void bio_cgroup_move_task(struct cgroup_subsys *ss,
> > +				struct cgroup *cont,
> > +				struct cgroup *old_cont,
> > +				struct task_struct *p)
> > +{
> > +	struct mm_struct *mm;
> > +	struct bio_cgroup *biog, *old_biog;
> > +
> > +	if (bio_cgroup_disabled())
> > +		return;
> > +
> > +	mm = get_task_mm(p);
> > +	if (mm == NULL)
> > +		return;
> > +
> > +	biog = cgroup_bio(cont);
> > +	old_biog = cgroup_bio(old_cont);
> > +
> > +	mmput(mm);
> > +	return;
> > +}
> 
> Is this function fully implemented?

This function can be more simplified, there is some unnecessary code 
from old version.

> I tried to put a process into a group by writing to
> "/cgroup/bio/BGROUP/tasks" but failed.

Could you tell me what you actually did? I will try the same thing.

--
Ryo Tsuruta <ryov@...inux.co.jp>
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