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From: Tejun Heo <htejun@gmail.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: Li Zefan <lizefan@huawei.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Ying Han <yinghan@google.com>,
	Glauber Costa <glommer@parallels.com>
Subject: Re: [RFC] rework mem_cgroup iterator
Date: Wed, 14 Nov 2012 10:30:07 -0800	[thread overview]
Message-ID: <20121114183007.GC21185@mtj.dyndns.org> (raw)
In-Reply-To: <20121114083653.GA17111@dhcp22.suse.cz>

Hello, Michal.

On Wed, Nov 14, 2012 at 09:36:53AM +0100, Michal Hocko wrote:
> > So memcg won't use css id at all, right?
> 
> Unfortunately we still use it for the swap accounting but that one could
> be replaced by something else, probably. Have to think about it.

I have a patch to add cgrp->id pending.  From what I can see, memcg
should be able to use that for swap accounting.

> > Then we can remove the whole css_id stuff, and that's quite a bunch of
> > code.

Yeap, that's the plan.

> Is memcg the only user of css_id? Quick grep shows that yes but I
> haven't checked all the callers of the exported functions. I would be
> happy if more code goes away.

Yeap, memcg is the only user and I really wanna remove it once memcg
moves onto saner stuff.

Thanks.

-- 
tejun

WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <htejun@gmail.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: Li Zefan <lizefan@huawei.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Ying Han <yinghan@google.com>,
	Glauber Costa <glommer@parallels.com>
Subject: Re: [RFC] rework mem_cgroup iterator
Date: Wed, 14 Nov 2012 10:30:07 -0800	[thread overview]
Message-ID: <20121114183007.GC21185@mtj.dyndns.org> (raw)
In-Reply-To: <20121114083653.GA17111@dhcp22.suse.cz>

Hello, Michal.

On Wed, Nov 14, 2012 at 09:36:53AM +0100, Michal Hocko wrote:
> > So memcg won't use css id at all, right?
> 
> Unfortunately we still use it for the swap accounting but that one could
> be replaced by something else, probably. Have to think about it.

I have a patch to add cgrp->id pending.  From what I can see, memcg
should be able to use that for swap accounting.

> > Then we can remove the whole css_id stuff, and that's quite a bunch of
> > code.

Yeap, that's the plan.

> Is memcg the only user of css_id? Quick grep shows that yes but I
> haven't checked all the callers of the exported functions. I would be
> happy if more code goes away.

Yeap, memcg is the only user and I really wanna remove it once memcg
moves onto saner stuff.

Thanks.

-- 
tejun

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  reply	other threads:[~2012-11-14 18:30 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-13 15:30 [RFC] rework mem_cgroup iterator Michal Hocko
2012-11-13 15:30 ` Michal Hocko
2012-11-13 15:30 ` [RFC 1/5] memcg: synchronize per-zone iterator access by a spinlock Michal Hocko
2012-11-13 15:30   ` Michal Hocko
2012-11-14  0:03   ` Kamezawa Hiroyuki
2012-11-14  0:03     ` Kamezawa Hiroyuki
2012-11-13 15:30 ` [RFC 2/5] memcg: rework mem_cgroup_iter to use cgroup iterators Michal Hocko
2012-11-13 15:30   ` Michal Hocko
2012-11-13 16:14   ` Tejun Heo
2012-11-13 16:14     ` Tejun Heo
2012-11-14  8:51     ` Michal Hocko
2012-11-14  8:51       ` Michal Hocko
2012-11-14 18:52       ` Tejun Heo
2012-11-14 18:52         ` Tejun Heo
2012-11-15  9:51         ` Michal Hocko
2012-11-15  9:51           ` Michal Hocko
2012-11-15 14:47           ` Tejun Heo
2012-11-15 14:47             ` Tejun Heo
2012-11-15 15:12             ` Michal Hocko
2012-11-15 15:12               ` Michal Hocko
2012-11-15 15:31               ` Tejun Heo
2012-11-15 15:31                 ` Tejun Heo
2012-11-15 16:15                 ` Michal Hocko
2012-11-15 16:15                   ` Michal Hocko
2012-11-14  0:20   ` Kamezawa Hiroyuki
2012-11-14  0:20     ` Kamezawa Hiroyuki
2012-11-14 10:10     ` Michal Hocko
2012-11-14 10:10       ` Michal Hocko
2012-11-15  4:12       ` Kamezawa Hiroyuki
2012-11-15  4:12         ` Kamezawa Hiroyuki
2012-11-15  9:52         ` Michal Hocko
2012-11-15  9:52           ` Michal Hocko
2012-11-19 14:05       ` Michal Hocko
2012-11-19 14:05         ` Michal Hocko
2012-11-19 15:11   ` Michal Hocko
2012-11-19 15:11     ` Michal Hocko
2012-11-13 15:30 ` [RFC 3/5] memcg: simplify mem_cgroup_iter Michal Hocko
2012-11-13 15:30   ` Michal Hocko
2012-11-13 15:30 ` [RFC 4/5] memcg: clean up mem_cgroup_iter Michal Hocko
2012-11-13 15:30   ` Michal Hocko
2012-11-13 15:30 ` [RFC 5/5] cgroup: remove css_get_next Michal Hocko
2012-11-13 15:30   ` Michal Hocko
2012-11-14  0:13 ` [RFC] rework mem_cgroup iterator Kamezawa Hiroyuki
2012-11-14  0:13   ` Kamezawa Hiroyuki
2012-11-14  1:55 ` Li Zefan
2012-11-14  1:55   ` Li Zefan
2012-11-14  8:36   ` Michal Hocko
2012-11-14  8:36     ` Michal Hocko
2012-11-14 18:30     ` Tejun Heo [this message]
2012-11-14 18:30       ` Tejun Heo
2012-11-15  2:12   ` Kamezawa Hiroyuki
2012-11-15  2:12     ` Kamezawa Hiroyuki
2012-11-14 16:17 ` Glauber Costa
2012-11-14 16:17   ` Glauber Costa
2012-11-14  8:40   ` Michal Hocko
2012-11-14  8:40     ` Michal Hocko
2012-11-14 18:41   ` Tejun Heo
2012-11-14 18:41     ` Tejun Heo
2012-11-15  2:44     ` Glauber Costa
2012-11-15  2:44       ` Glauber Costa
2012-11-14 18:46       ` Tejun Heo
2012-11-14 18:46         ` Tejun Heo

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