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authorMel Gorman <mel@csn.ul.ie>2008-04-28 05:12:18 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 11:58:19 -0400
commit19770b32609b6bf97a3dece2529089494cbfc549 (patch)
tree3b5922d1b20aabdf929bde9309f323841717747a /mm/hugetlb.c
parentdd1a239f6f2d4d3eedd318583ec319aa145b324c (diff)
mm: filter based on a nodemask as well as a gfp_mask
The MPOL_BIND policy creates a zonelist that is used for allocations controlled by that mempolicy. As the per-node zonelist is already being filtered based on a zone id, this patch adds a version of __alloc_pages() that takes a nodemask for further filtering. This eliminates the need for MPOL_BIND to create a custom zonelist. A positive benefit of this is that allocations using MPOL_BIND now use the local node's distance-ordered zonelist instead of a custom node-id-ordered zonelist. I.e., pages will be allocated from the closest allowed node with available memory. [Lee.Schermerhorn@hp.com: Mempolicy: update stale documentation and comments] [Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask] [Lee.Schermerhorn@hp.com: Mempolicy: make dequeue_huge_page_vma() obey MPOL_BIND nodemask rework] Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 4bced0d705c..3737d82f522 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -95,12 +95,14 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
95 int nid; 95 int nid;
96 struct page *page = NULL; 96 struct page *page = NULL;
97 struct mempolicy *mpol; 97 struct mempolicy *mpol;
98 nodemask_t *nodemask;
98 struct zonelist *zonelist = huge_zonelist(vma, address, 99 struct zonelist *zonelist = huge_zonelist(vma, address,
99 htlb_alloc_mask, &mpol); 100 htlb_alloc_mask, &mpol, &nodemask);
100 struct zone *zone; 101 struct zone *zone;
101 struct zoneref *z; 102 struct zoneref *z;
102 103
103 for_each_zone_zonelist(zone, z, zonelist, MAX_NR_ZONES - 1) { 104 for_each_zone_zonelist_nodemask(zone, z, zonelist,
105 MAX_NR_ZONES - 1, nodemask) {
104 nid = zone_to_nid(zone); 106 nid = zone_to_nid(zone);
105 if (cpuset_zone_allowed_softwall(zone, htlb_alloc_mask) && 107 if (cpuset_zone_allowed_softwall(zone, htlb_alloc_mask) &&
106 !list_empty(&hugepage_freelists[nid])) { 108 !list_empty(&hugepage_freelists[nid])) {