include/linux/page-isolation.h

   1 #ifndef __LINUX_PAGEISOLATION_H
   2 #define __LINUX_PAGEISOLATION_H
   3
   4 #ifdef CONFIG_MEMORY_ISOLATION
   5 static inline bool has_isolate_pageblock(struct zone *zone)
   6 {
   7         return zone->nr_isolate_pageblock;
   8 }
   9 static inline bool is_migrate_isolate_page(struct page *page)
  10 {
  11         return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
  12 }
  13 static inline bool is_migrate_isolate(int migratetype)
  14 {
  15         return migratetype == MIGRATE_ISOLATE;
  16 }
  17 #else
  18 static inline bool has_isolate_pageblock(struct zone *zone)
  19 {
  20         return false;
  21 }
  22 static inline bool is_migrate_isolate_page(struct page *page)
  23 {
  24         return false;
  25 }
  26 static inline bool is_migrate_isolate(int migratetype)
  27 {
  28         return false;
  29 }
  30 #endif
  31
  32 bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
  33                          bool skip_hwpoisoned_pages);
  34 void set_pageblock_migratetype(struct page *page, int migratetype);
  35 int move_freepages_block(struct zone *zone, struct page *page,
  36                                 int migratetype, int *num_movable);
  37
  38 /*
  39  * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
  40  * If specified range includes migrate types other than MOVABLE or CMA,
  41  * this will fail with -EBUSY.
  42  *
  43  * For isolating all pages in the range finally, the caller have to
  44  * free all pages in the range. test_page_isolated() can be used for
  45  * test it.
  46  */
  47 int
  48 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  49                          unsigned migratetype, bool skip_hwpoisoned_pages);
  50
  51 /*
  52  * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
  53  * target range is [start_pfn, end_pfn)
  54  */
  55 int
  56 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  57                         unsigned migratetype);
  58
  59 /*
  60  * Test all pages in [start_pfn, end_pfn) are isolated or not.
  61  */
  62 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
  63                         bool skip_hwpoisoned_pages);
  64
  65 struct page *alloc_migrate_target(struct page *page, unsigned long private,
  66                                 int **resultp);
  67
  68 #endif