Add soft limits to the memory controller v2
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- v1 Latest4 patches 4 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/4 | Modify resource counters to add soft limit support v2include/ kernel/ mm/ | +36 | 0 replies | |
| 2/4 | Add the soft limit interface v2mm/ | +32 | 4 replies | |
| 3/4 | Reclaim from groups over their soft limit under memory pressure v2include/ include/ include/ +3 more | +110 | 0 replies | |
| 4/4 | Add soft limit documentation v2Documentation/ | +17 | 0 replies |
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Cover letter [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
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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
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Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to [email protected]. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"[email protected]"> [email protected] </a>