linux-kernel - Re: [PATCH][-mm] memcg : memory cgroup cpu hotplug support update.

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Date:	Fri, 17 Sep 2010 12:05:37 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH][-mm] memcg : memory cgroup cpu hotplug support update.

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> [2010-09-16 16:17:27]:

> On Thu, 16 Sep 2010 15:22:04 +0900
> KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> 
> > This naming is from mem_cgroup_walk_tree(). Now we have
> > 
> >   mem_cgroup_walk_tree();
> >   mem_cgroup_walk_all();
> > 
> > Rename both ? But it should be in separated patch.
> > 
> 
> Considering a bit ...but..
> 
> #define for_each_mem_cgroup(mem) \
> 	for (mem = mem_cgroup_get_first(); \
> 	     mem; \
> 	     mem = mem_cgroup_get_next(mem);) \
> 
> seems to need some helper functions. I'll consider about this clean up
> but it requires some amount of patch because css_get()/css_put()/rcu...etc..
> are problematic.
>

Why does this need to be a macro (I know we use this for lists and
other places), assuming for now we don't use the iterator pattern, we
can rename mem_cgroup_walk_all() to for_each_mem_cgroup(). 

-- 
	Three Cheers,
	Balbir
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