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