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

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Date:	Wed, 04 Jun 2008 14:42:21 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...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

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.
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