hugetlb: V6 constrain allocation/free based on task mempolicy
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b4 am [email protected]Versions newest first
- v1 Latest6 patches 14 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/6 | hugetlb: rework hstate_next_node_* functionsmm/ | +45 | 0 replies | |
| 2/6 | hugetlb: add nodemask arg to huge page alloc, free and surplus adjust fcnsmm/ | +71 | 0 replies | |
| 3/6 | hugetlb: introduce alloc_nodemask_of_nodeinclude/ | +20 | 6 replies | |
| 4/6 | hugetlb: derive huge pages nodes allowed from task mempolicyinclude/ mm/ mm/ | +65 | 2 replies | |
| 5/6 | hugetlb: add per node hstate attributesdrivers/ include/ mm/ | +251 | 6 replies | |
| 6/6 | hugetlb: update hugetlb documentation for mempolicy based management.Documentation/ | +175 | 0 replies |
Reviews trailers per patch
5 of 6 patches have a Reviewed-by or Acked-by.
| Patch | David Rientjes | Mel Gorman |
|---|---|---|
| 1/6 | A-b | R-b |
| 2/6 | A-b | R-b |
| 3/6 | ||
| 4/6 | A-b | |
| 5/6 | A-b | A-b |
| 6/6 | A-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/6] hugetlb: V6 constrain allocation/free based on task mempolicy
PATCH 0/6 hugetlb: numa control of persistent huge pages alloc/free
Against: 2.6.31-rc7-mmotm-090827-1651
This is V6 of a series of patches to provide control over the location of the allocation and freeing of persistent huge pages on a NUMA
platform. Please consider V6 [patches 1-6] for merging into mmotm.
This series uses two mechanisms to constrain the nodes from which persistent huge pages are allocated: 1) the task NUMA mempolicy of the task modifying "nr_hugepages", based on a suggestion by Mel Gorman; and 2) a subset of the hugepages hstate sysfs attributes have been added [in V4] to each node system device under:
/sys/devices/node/node[0-9]*/hugepages.
The per node attibutes allow direct assignment of a huge page count on a specific node, regardless of the task's mempolicy or cpuset constraints.
V5 addressed review comments -- changes described in patch descriptions.
V6 addresses more review comments, described in the patches.
Attached to V6, I'm sending a 3 patch series that implements an
enhancement suggested by David Rientjes: the default huge page nodes
allowed mask will be the nodes with memory rather than all on-line nodes. The "nodes with memory" state already tracks memory/node hot-plug. Further, we will allocate per node hstate attributes only for nodes with memory. This requires that we register a memory on/off-line notifier and [un]register the attributes on transitions to/from memoryless state.
Because of the interaction with memory hotplug, these 3 patches will likely require more work and testing before merging. The first six patches do not depend on these 3 and, IMO, need not wait for them.
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