LXR linux/include/linux/page-isolation.h

   1#ifndef __LINUX_PAGEISOLATION_H
   2#define __LINUX_PAGEISOLATION_H
   3
   4
   5bool has_unmovable_pages(struct zone *zone, struct page *page, int count);
   6void set_pageblock_migratetype(struct page *page, int migratetype);
   7int move_freepages_block(struct zone *zone, struct page *page,
   8                                int migratetype);
   9int 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 */
  22int
  23start_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 */
  30int
  31undo_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 */
  37int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
  38
  39/*
  40 * Internal functions. Changes pageblock's migrate type.
  41 */
  42int set_migratetype_isolate(struct page *page);
  43void unset_migratetype_isolate(struct page *page, unsigned migratetype);
  44struct page *alloc_migrate_target(struct page *page, unsigned long private,
  45                                int **resultp);
  46
  47#endif
  48