linux-kernel - [mm][PATCH 0/4] Add soft limits to the memory controller v2

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Message-Id: <20080219070232.25349.21196.sendpatchset@localhost.localdomain>
Date:	Tue, 19 Feb 2008 12:32:32 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	linux-mm@...ck.org
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	Hugh Dickins <hugh@...itas.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Herbert Poetzl <herbert@...hfloor.at>,
	Paul Menage <menage@...gle.com>, linux-kernel@...r.kernel.org,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Rientjes <rientjes@...gle.com>,
	Pavel Emelianov <xemul@...nvz.org>,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Rik Van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [mm][PATCH 0/4] Add soft limits to the memory controller v2

This patchset implements the basic changes required to implement soft limits
in the memory controller. A soft limit is a variation of the currently
supported hard limit feature. A memory cgroup can exceed it's soft limit
provided there is no contention for memory.

These patches were tested on a PowerPC box, by running a programs in parallel,
and checking their behaviour for various soft limit values.

These patches were developed on top of 2.6.25-rc2-mm1. Comments, suggestions,
criticism are all welcome!

TODOs:

1. Currently there is no ordering of memory cgroups over their limit.
   We use a simple linked list to maintain a list of groups over their
   limit. In the future, we might want to create a heap of objects ordered
   by the amount by which they exceed soft limit.
2. Distribute the excessive (non-contended) resources between groups
   in the ratio of their soft limits
3. Merge with KAMEZAWA's and YAMAMOTO's water mark and background reclaim
   patches in the long-term

series
------
memory-controller-res_counters-soft-limit-setup.patch
memory-controller-add-soft-limit-interface.patch
memory-controller-reclaim-on-contention.patch
memory-controller-add-soft-limit-documentation.patch

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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