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