From 54a6eb5c4765aa573a030ceeba2c14e3d2ea5706 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Mon, 28 Apr 2008 02:12:16 -0700 Subject: mm: use two zonelist that are filtered by GFP mask Currently a node has two sets of zonelists, one for each zone type in the system and a second set for GFP_THISNODE allocations. Based on the zones allowed by a gfp mask, one of these zonelists is selected. All of these zonelists consume memory and occupy cache lines. This patch replaces the multiple zonelists per-node with two zonelists. The first contains all populated zones in the system, ordered by distance, for fallback allocations when the target/preferred node has no free pages. The second contains all populated zones in the node suitable for GFP_THISNODE allocations. An iterator macro is introduced called for_each_zone_zonelist() that interates through each zone allowed by the GFP flags in the selected zonelist. Signed-off-by: Mel Gorman Acked-by: Christoph Lameter Signed-off-by: Lee Schermerhorn Cc: KAMEZAWA Hiroyuki Cc: Mel Gorman Cc: Christoph Lameter Cc: Hugh Dickins Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'mm/hugetlb.c') diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 51c9e2c0164..ddd141cad77 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -97,11 +97,11 @@ static struct page *dequeue_huge_page_vma(struct vm_area_struct *vma, struct mempolicy *mpol; struct zonelist *zonelist = huge_zonelist(vma, address, htlb_alloc_mask, &mpol); - struct zone **z; + struct zone *zone, **z; - for (z = zonelist->zones; *z; z++) { - nid = zone_to_nid(*z); - if (cpuset_zone_allowed_softwall(*z, htlb_alloc_mask) && + for_each_zone_zonelist(zone, z, zonelist, MAX_NR_ZONES - 1) { + nid = zone_to_nid(zone); + if (cpuset_zone_allowed_softwall(zone, htlb_alloc_mask) && !list_empty(&hugepage_freelists[nid])) { page = list_entry(hugepage_freelists[nid].next, struct page, lru); -- cgit v1.2.3