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Date: Mon, 9 Mar 2009 13:14:49 +0530
From: Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: Re: [RFC][PATCH 1/4] memcg: add softlimit interface and utilitiy
	function.
Message-ID: <20090309074449.GH24321@balbir.in.ibm.com>
Reply-To: balbir@linux.vnet.ibm.com
References: <20090309163745.5e3805ba.kamezawa.hiroyu@jp.fujitsu.com> <20090309163907.a3cee183.kamezawa.hiroyu@jp.fujitsu.com>
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To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>, "nishimura@mxp.nes.nec.co.jp" <nishimura@mxp.nes.nec.co.jp>, "kosaki.motohiro@jp.fujitsu.com" <kosaki.motohiro@jp.fujitsu.com>
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* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2009-03-09 16:39:07]:

> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> Adds an interface for defining sotlimit per memcg. (no handler in this patch.)
> softlimit.priority and queue for softlimit is added in the next patch.
> 
> 
> Changelog v1->v2:
>  - For refactoring, divided a patch into 2 part and this patch just
>    involves memory.softlimit interface.
>  - Removed governor-detect routine, it was buggy in design.
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> ---
>  mm/memcontrol.c |   62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 60 insertions(+), 2 deletions(-)


This patch breaks the semantics of resource counters. We would like to
use resource counters to track all overhead. I've refined my tracking
to an extent that the overhead does not show up at all, unless soft
limits kick in. I oppose keeping soft limits outside of resource
counters.


-- 
	Balbir

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