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mm: filter based on a nodemask as well as a gfp_mask

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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>
This commit is contained in:
Mel Gorman
2008-04-28 02:12:18 -07:00
committed by Linus Torvalds
parent dd1a239f6f
commit 19770b3260
11 changed files with 224 additions and 191 deletions
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6
mm/hugetlb.c
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@ -95,12 +95,14 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma,
int nid;
struct page *page = NULL;
struct mempolicy *mpol;
nodemask_t *nodemask;
struct zonelist *zonelist = huge_zonelist(vma, address,
htlb_alloc_mask, &mpol);
htlb_alloc_mask, &mpol, &nodemask);
struct zone *zone;
struct zoneref *z;
for_each_zone_zonelist(zone, z, zonelist, MAX_NR_ZONES - 1) {
for_each_zone_zonelist_nodemask(zone, z, zonelist,
MAX_NR_ZONES - 1, nodemask) {
nid = zone_to_nid(zone);
if (cpuset_zone_allowed_softwall(zone, htlb_alloc_mask) &&
!list_empty(&hugepage_freelists[nid])) {