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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 /fs/buffer.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 'fs/buffer.c')
-rw-r--r--fs/buffer.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index ac84cd13075d..7d51e649b19a 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -360,16 +360,17 @@ void invalidate_bdev(struct block_device *bdev)
360 */ 360 */
361static void free_more_memory(void) 361static void free_more_memory(void)
362{ 362{
363 struct zoneref *zrefs; 363 struct zone *zone;
364 int nid; 364 int nid;
365 365
366 wakeup_pdflush(1024); 366 wakeup_pdflush(1024);
367 yield(); 367 yield();
368 368
369 for_each_online_node(nid) { 369 for_each_online_node(nid) {
370 zrefs = first_zones_zonelist(node_zonelist(nid, GFP_NOFS), 370 (void)first_zones_zonelist(node_zonelist(nid, GFP_NOFS),
371 gfp_zone(GFP_NOFS)); 371 gfp_zone(GFP_NOFS), NULL,
372 if (zrefs->zone) 372 &zone);
373 if (zone)
373 try_to_free_pages(node_zonelist(nid, GFP_NOFS), 0, 374 try_to_free_pages(node_zonelist(nid, GFP_NOFS), 0,
374 GFP_NOFS); 375 GFP_NOFS);
375 } 376 }