netdev - [BUGFIX][PATCH 0/3] memcg: tcp memcontrol fixes.

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Message-ID: <4F7408B7.9090706@jp.fujitsu.com>
Date:	Thu, 29 Mar 2012 16:01:11 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Glauber Costa <glommer@...allels.com>, netdev@...r.kernel.org
CC:	David Miller <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kamezawa.hiroyu@...fujitsu.com
Subject: [BUGFIX][PATCH 0/3] memcg: tcp memcontrol fixes.

I'm very sorry if you received this e-mail twice.
==
This series is 3 bugfixes for memcg's kmem.tcp memory controller.
Maybe this should go via network tree.
(CC akpm for noticing an ugly change in res_counter.)

All patches are generated onto today linus's git tree.

Brief description:

Patch  1/3 .... tcp memcontrol doesn't see memcg's use_hierarchy value. Fix it.

Patch  2/3 and 3/3 .... 
                Because tcp memcontrol doesn't do any accounting when limit=RESOUCE_MAX,
	        there will be account leakage when limit is changed. This can trigger
                WARN_ON() in res_counter which checks usage >= 0.

Patch 2/3  .... don't call static_key_slow_dec(&memcg_socket_limit_enabled) until
                a cgroup under accounted is destroyed.

Patch 3/3  .... add res_counter_uncharge_nowarn() to ignore leakage.

Thanks,
-Kame

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