diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 51070b6d593f..9810f0a60db7 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -694,7 +694,8 @@ static void __drain_pages(unsigned int cpu) void mark_free_pages(struct zone *zone) { - unsigned long zone_pfn, flags; + unsigned long pfn, max_zone_pfn; + unsigned long flags; int order; struct list_head *curr; @@ -702,18 +703,25 @@ void mark_free_pages(struct zone *zone) return; spin_lock_irqsave(&zone->lock, flags); - for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn) - ClearPageNosaveFree(pfn_to_page(zone_pfn + zone->zone_start_pfn)); + + max_zone_pfn = zone->zone_start_pfn + zone->spanned_pages; + for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) + if (pfn_valid(pfn)) { + struct page *page = pfn_to_page(pfn); + + if (!PageNosave(page)) + ClearPageNosaveFree(page); + } for (order = MAX_ORDER - 1; order >= 0; --order) list_for_each(curr, &zone->free_area[order].free_list) { - unsigned long start_pfn, i; + unsigned long i; - start_pfn = page_to_pfn(list_entry(curr, struct page, lru)); + pfn = page_to_pfn(list_entry(curr, struct page, lru)); + for (i = 0; i < (1UL << order); i++) + SetPageNosaveFree(pfn_to_page(pfn + i)); + } - for (i=0; i < (1<<order); i++) - SetPageNosaveFree(pfn_to_page(start_pfn+i)); - } spin_unlock_irqrestore(&zone->lock, flags); } |