[RFC] [PATCH 0/4] Add soft limits to the memory controller

[Balbir Singh <balbir@linux.vnet.ibm.com>]

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 under KVM and 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 2.6.24-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


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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