diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 17ce3faeecca..d0e56c880154 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3160,6 +3160,20 @@ static inline unsigned long wait_table_bits(unsigned long size) #define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1)) /* + * Check if a pageblock contains reserved pages + */ +static int pageblock_is_reserved(unsigned long start_pfn) +{ + unsigned long end_pfn = start_pfn + pageblock_nr_pages; + unsigned long pfn; + + for (pfn = start_pfn; pfn < end_pfn; pfn++) + if (PageReserved(pfn_to_page(pfn))) + return 1; + return 0; +} + +/* * Mark a number of pageblocks as MIGRATE_RESERVE. The number * of blocks reserved is based on min_wmark_pages(zone). The memory within * the reserve will tend to store contiguous free pages. Setting min_free_kbytes @@ -3198,7 +3212,7 @@ static void setup_zone_migrate_reserve(struct zone *zone) continue; /* Blocks with reserved pages will never free, skip them. */ - if (PageReserved(page)) + if (pageblock_is_reserved(pfn)) continue; block_migratetype = get_pageblock_migratetype(page); |