| From: |
| Balbir Singh <balbir@linux.vnet.ibm.com> |
| To: |
| linux-mm@kvack.org |
| Subject: |
| [mm][PATCH 0/4] Add soft limits to the memory controller v2 |
| Date: |
| Tue, 19 Feb 2008 12:32:32 +0530 |
| Message-ID: |
| <20080219070232.25349.21196.sendpatchset@localhost.localdomain> |
| Cc: |
| Nick Piggin <nickpiggin@yahoo.com.au>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Sudhir Kumar <skumar@linux.vnet.ibm.com>,
Hugh Dickins <hugh@veritas.com>,
YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
Herbert Poetzl <herbert@13thfloor.at>,
Paul Menage <menage@google.com>, linux-kernel@vger.kernel.org,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
David Rientjes <rientjes@google.com>,
Pavel Emelianov <xemul@openvz.org>,
Dhaval Giani <dhaval@linux.vnet.ibm.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Rik Van Riel <riel@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> |
| Archive‑link: | |
Article |
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
