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author | Lee Schermerhorn <lee.schermerhorn@hp.com> | 2009-12-15 04:58:16 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 19:53:12 +0300 |
commit | 6ae11b278bca1cd41651bae49a8c69de2f6a6262 (patch) | |
tree | 8bf4203ce676cac4f5ce1d03b35adbca1571d295 /include/linux/mempolicy.h | |
parent | 9a76db099709388ae4126c4f441358b97c6ba20c (diff) | |
download | linux-6ae11b278bca1cd41651bae49a8c69de2f6a6262.tar.xz |
hugetlb: add nodemask arg to huge page alloc, free and surplus adjust functions
In preparation for constraining huge page allocation and freeing by the
controlling task's numa mempolicy, add a "nodes_allowed" nodemask pointer
to the allocate, free and surplus adjustment functions. For now, pass
NULL to indicate default behavior--i.e., use node_online_map. A
subsqeuent patch will derive a non-default mask from the controlling
task's numa mempolicy.
Note that this method of updating the global hstate nr_hugepages under the
constraint of a nodemask simplifies keeping the global state
consistent--especially the number of persistent and surplus pages relative
to reservations and overcommit limits. There are undoubtedly other ways
to do this, but this works for both interfaces: mempolicy and per node
attributes.
[rientjes@google.com: fix HIGHMEM compile error]
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Reviewed-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Andi Kleen <andi@firstfloor.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Eric Whitney <eric.whitney@hp.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mempolicy.h')
0 files changed, 0 insertions, 0 deletions