linux-kernel - Re: [patch 00/10] memcg naturalization -rc4

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Date:	Mon, 3 Oct 2011 16:11:49 -0700
From:	Andrew Morton <akpm00@...il.com>
To:	Johannes Weiner <jweiner@...hat.com>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Balbir Singh <bsingharora@...il.com>,
	Ying Han <yinghan@...gle.com>,
	Greg Thelen <gthelen@...gle.com>,
	Michel Lespinasse <walken@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Hugh Dickins <hughd@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 00/10] memcg naturalization -rc4

On Thu, 29 Sep 2011 23:00:54 +0200
Johannes Weiner <jweiner@...hat.com> wrote:

> this is the fourth revision of the memory cgroup naturalization
> series.

The patchset removes 20 lines from include/linux/*.h and removes
exactly zero lines from mm/*.c.  Freaky.

If we were ever brave/stupid emough to make
CONFIG_CGROUP_MEM_RES_CTLR=y unconditional, how much could we simplify
mm/?

We are adding bits of overhead to the  CONFIG_CGROUP_MEM_RES_CTLR=n case
all over the place.  This patchset actually decreases the size of allnoconfig
mm/built-in.o by 1/700th.

A "struct mem_cgroup" sometimes gets called "mem", sometimes "memcg",
sometimes "mem_cont".  Any more candidates?  Is there any logic to
this?

Anyway...  it all looks pretty sensible to me, but the timing (at
-rc8!) is terrible.  Please keep this material maintained for -rc1, OK?
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