diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index af982f7cdb2..27b8681139f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -268,13 +268,14 @@ void prep_compound_page(struct page *page, unsigned long order) { int i; int nr_pages = 1 << order; + struct page *p = page + 1; set_compound_page_dtor(page, free_compound_page); set_compound_order(page, order); __SetPageHead(page); - for (i = 1; i < nr_pages; i++) { - struct page *p = page + i; - + for (i = 1; i < nr_pages; i++, p++) { + if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0)) + p = pfn_to_page(page_to_pfn(page) + i); __SetPageTail(p); p->first_page = page; } @@ -284,6 +285,7 @@ static void destroy_compound_page(struct page *page, unsigned long order) { int i; int nr_pages = 1 << order; + struct page *p = page + 1; if (unlikely(compound_order(page) != order)) bad_page(page); @@ -291,8 +293,9 @@ static void destroy_compound_page(struct page *page, unsigned long order) if (unlikely(!PageHead(page))) bad_page(page); __ClearPageHead(page); - for (i = 1; i < nr_pages; i++) { - struct page *p = page + i; + for (i = 1; i < nr_pages; i++, p++) { + if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0)) + p = pfn_to_page(page_to_pfn(page) + i); if (unlikely(!PageTail(p) | (p->first_page != page))) @@ -694,6 +697,9 @@ static int move_freepages(struct zone *zone, #endif for (page = start_page; page <= end_page;) { + /* Make sure we are not inadvertently changing nodes */ + VM_BUG_ON(page_to_nid(page) != zone_to_nid(zone)); + if (!pfn_valid_within(page_to_pfn(page))) { page++; continue; @@ -2516,6 +2522,10 @@ static void setup_zone_migrate_reserve(struct zone *zone) continue; page = pfn_to_page(pfn); + /* Watch out for overlapping nodes */ + if (page_to_nid(page) != zone_to_nid(zone)) + continue; + /* Blocks with reserved pages will never free, skip them. */ if (PageReserved(page)) continue; @@ -4064,7 +4074,7 @@ void __init set_dma_reserve(unsigned long new_dma_reserve) } #ifndef CONFIG_NEED_MULTIPLE_NODES -struct pglist_data contig_page_data = { .bdata = &bootmem_node_data[0] }; +struct pglist_data __refdata contig_page_data = { .bdata = &bootmem_node_data[0] }; EXPORT_SYMBOL(contig_page_data); #endif |