From: Christoph Lameter I found two location in hugetlb.c where we chase pointer instead of using page_to_nid(). Page_to_nid is more effective and can get the node directly from page flags. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton --- mm/hugetlb.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff -puN mm/hugetlb.c~hugepages-use-page_to_nid-rather-than-traversing-zone-pointers mm/hugetlb.c --- a/mm/hugetlb.c~hugepages-use-page_to_nid-rather-than-traversing-zone-pointers +++ a/mm/hugetlb.c @@ -177,7 +177,7 @@ static void update_and_free_page(struct { int i; nr_huge_pages--; - nr_huge_pages_node[page_zone(page)->zone_pgdat->node_id]--; + nr_huge_pages_node[page_to_nid(page)]--; for (i = 0; i < (HPAGE_SIZE / PAGE_SIZE); i++) { page[i].flags &= ~(1 << PG_locked | 1 << PG_error | 1 << PG_referenced | 1 << PG_dirty | 1 << PG_active | 1 << PG_reserved | @@ -191,7 +191,8 @@ static void update_and_free_page(struct #ifdef CONFIG_HIGHMEM static void try_to_free_low(unsigned long count) { - int i, nid; + int i; + for (i = 0; i < MAX_NUMNODES; ++i) { struct page *page, *next; list_for_each_entry_safe(page, next, &hugepage_freelists[i], lru) { @@ -199,9 +200,8 @@ static void try_to_free_low(unsigned lon continue; list_del(&page->lru); update_and_free_page(page); - nid = page_zone(page)->zone_pgdat->node_id; free_huge_pages--; - free_huge_pages_node[nid]--; + free_huge_pages_node[page_to_nid(page)]--; if (count >= nr_huge_pages) return; } _