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[PATCH] Hugepages: Use page_to_nid rather than traversing zone pointers
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 <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -177,7 +177,7 @@ static void update_and_free_page(struct page *page)
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{
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int i;
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nr_huge_pages--;
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nr_huge_pages_node[page_zone(page)->zone_pgdat->node_id]--;
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nr_huge_pages_node[page_to_nid(page)]--;
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for (i = 0; i < (HPAGE_SIZE / PAGE_SIZE); i++) {
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page[i].flags &= ~(1 << PG_locked | 1 << PG_error | 1 << PG_referenced |
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1 << PG_dirty | 1 << PG_active | 1 << PG_reserved |
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@ -191,7 +191,8 @@ static void update_and_free_page(struct page *page)
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#ifdef CONFIG_HIGHMEM
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static void try_to_free_low(unsigned long count)
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{
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int i, nid;
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int i;
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for (i = 0; i < MAX_NUMNODES; ++i) {
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struct page *page, *next;
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list_for_each_entry_safe(page, next, &hugepage_freelists[i], lru) {
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@ -199,9 +200,8 @@ static void try_to_free_low(unsigned long count)
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continue;
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list_del(&page->lru);
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update_and_free_page(page);
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nid = page_zone(page)->zone_pgdat->node_id;
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free_huge_pages--;
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free_huge_pages_node[nid]--;
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free_huge_pages_node[page_to_nid(page)]--;
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if (count >= nr_huge_pages)
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return;
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}
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