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Date: Tue, 11 Mar 2008 21:40:34 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Pavel Emelyanov <xemul@openvz.org>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Add the max_usage member on the res_counter
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On Tue, 11 Mar 2008 17:55:46 +0300 Pavel Emelyanov <xemul@openvz.org> wrote:

> This field is the maximal value of the usage one since the counter
> creation (or since the latest reset).
> 
> To reset this to the usage value simply write anything to the
> appropriate cgroup file.

What is the justification for making this change?  Why do we need it? 
Please provide this information for all patches where it is not obvious.

>  	{
> +		.name = "max_usage_in_bytes",
> +		.private = RES_MAX_USAGE,
> +		.write = mem_cgroup_max_reset,
> +		.read_u64 = mem_cgroup_read,
> +	},

Documentation/controllers/memory.txt needs updating.