include/linux/page-isolation.h

   1 #ifndef __LINUX_PAGEISOLATION_H
   2 #define __LINUX_PAGEISOLATION_H
   3
   4
   5 bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
   6                          bool skip_hwpoisoned_pages);
   7 void set_pageblock_migratetype(struct page *page, int migratetype);
   8 int move_freepages_block(struct zone *zone, struct page *page,
   9                                 int migratetype);
  10 int move_freepages(struct zone *zone,
  11                           struct page *start_page, struct page *end_page,
  12                           int migratetype);
  13
  14 /*
  15  * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
  16  * If specified range includes migrate types other than MOVABLE or CMA,
  17  * this will fail with -EBUSY.
  18  *
  19  * For isolating all pages in the range finally, the caller have to
  20  * free all pages in the range. test_page_isolated() can be used for
  21  * test it.
  22  */
  23 int
  24 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  25                          unsigned migratetype, bool skip_hwpoisoned_pages);
  26
  27 /*
  28  * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
  29  * target range is [start_pfn, end_pfn)
  30  */
  31 int
  32 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  33                         unsigned migratetype);
  34
  35 /*
  36  * Test all pages in [start_pfn, end_pfn) are isolated or not.
  37  */
  38 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
  39                         bool skip_hwpoisoned_pages);
  40
  41 /*
  42  * Internal functions. Changes pageblock's migrate type.
  43  */
  44 int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages);
  45 void unset_migratetype_isolate(struct page *page, unsigned migratetype);
  46 struct page *alloc_migrate_target(struct page *page, unsigned long private,
  47                                 int **resultp);
  48
  49 #endif