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