hugetlb: V7 constrain allocation/free based on task mempolicy
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- v1 Latest11 patches 6 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/11 | hugetlb: rework hstate_next_node_* functionsmm/ | +45 | 3 replies | |
| 2/11 | hugetlb: add nodemask arg to huge page alloc, free and surplus adjust fcnsmm/ | +71 | 0 replies | |
| 3/11 | hugetlb: introduce alloc_nodemask_of_nodeinclude/ | +20 | 0 replies | |
| 4/11 | hugetlb: derive huge pages nodes allowed from task mempolicyinclude/ mm/ mm/ | +67 | 0 replies | |
| 5/11 | hugetlb: add generic definition of NUMA_NO_NODEarch/ arch/ include/ | +4 | 1 reply | |
| 6/11 | hugetlb: add per node hstate attributesdrivers/ include/ mm/ | +301 | 0 replies | |
| 7/11 | hugetlb: update hugetlb documentation for mempolicy based management.Documentation/ | +175 | 1 reply | |
| 8/11 | hugetlb: Optionally use mempolicy for persistent huge page allocationDocumentation/ include/ kernel/ +1 more | +114 | 1 reply | |
| 9/11 | hugetlb: use only nodes with memory for huge pagesDocumentation/ mm/ | +26 | 0 replies | |
| 10/11 | hugetlb: handle memory hot-plug eventsDocumentation/ drivers/ | +50 | 0 replies | |
| 11/11 | hugetlb: offload per node attribute registrationsdrivers/ include/ | +47 | 0 replies |
Reviews trailers per patch
6 of 11 patches have a Reviewed-by or Acked-by.
| Patch | David Rientjes | Mel Gorman |
|---|---|---|
| 1/11 | A-b | R-b |
| 2/11 | A-b | R-b |
| 3/11 | ||
| 4/11 | A-b | |
| 5/11 | A-b | A-b |
| 6/11 | A-b | |
| 7/11 | A-b | A-b |
| 8/11 | ||
| 9/11 | ||
| 10/11 | ||
| 11/11 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/11] hugetlb: V7 constrain allocation/free based on task mempolicy
PATCH 0/11 hugetlb: numa control of persistent huge pages alloc/free
Against: 2.6.31-mmotm-090914-0157
This is V7 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 [at least patches 1-8] 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 a new sysctl "nr_hugepages_mempolicy" [patch 8], 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 addressed more review comments, described in the patches.
V6 also included 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 and 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.
V7 addresses review comments,, described in the patches, and includes a new patch, originally from Mel Gorman, to define a new vm sysctl and sysfs global hugepages attribute "nr_hugepages_mempolicy" rather than apply mempolicy contraints to pool adujstments via the pre-existing "nr_hugepages". The 3 patches to restrict hugetlb to visiting only nodes with memory and to add/remove per node hstate attributes on memory hotplug complete V7.
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