linux-kernel - Re: [RFC][PATCH 2/2] memcg: hardwall hierarhcy for memcg

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Date:	Wed, 4 Jun 2008 15:54:16 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"menage@...gle.com" <menage@...gle.com>,
	"xemul@...nvz.org" <xemul@...nvz.org>,
	"yamamoto@...inux.co.jp" <yamamoto@...inux.co.jp>
Subject: Re: [RFC][PATCH 2/2] memcg: hardwall hierarhcy for memcg

On Wed, 04 Jun 2008 14:42:21 +0800
Li Zefan <lizf@...fujitsu.com> wrote:

> KAMEZAWA Hiroyuki wrote:
> > Hard-Wall hierarchy support for memcg.
> >  - new member hierarchy_model is added to memcg.
> > 
> > Only root cgroup can modify this only when there is no children.
> > 
> > Adds following functions for supporting HARDWALL hierarchy.
> >  - try to reclaim memory at the change of "limit".
> >  - try to reclaim all memory at force_empty
> >  - returns resources to the parent at destroy.
> > 
> > Changelog v2->v3
> >  - added documentation.
> >  - hierarhcy_model parameter is added.
> > 
> > 
> > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> > 
> > ---
> >  Documentation/controllers/memory.txt |   27 +++++-
> >  mm/memcontrol.c                      |  156 ++++++++++++++++++++++++++++++++++-
> >  2 files changed, 178 insertions(+), 5 deletions(-)
> > 
> > Index: temp-2.6.26-rc2-mm1/mm/memcontrol.c
> > ===================================================================
> > --- temp-2.6.26-rc2-mm1.orig/mm/memcontrol.c
> > +++ temp-2.6.26-rc2-mm1/mm/memcontrol.c
> > @@ -137,6 +137,8 @@ struct mem_cgroup {
> >  	struct mem_cgroup_lru_info info;
> >  
> >  	int	prev_priority;	/* for recording reclaim priority */
> > +
> > +	int	hierarchy_model; /* used hierarchical policy */
> 
> hierarchy_model can be a global value instead of per cgroup value.
> 
Ah, Hmm...yes. thank you for pointing out.

Regards,
-Kame

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