linux/include/linux/page-isolation.h
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   1#ifndef __LINUX_PAGEISOLATION_H
   2#define __LINUX_PAGEISOLATION_H
   3
   4
   5bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
   6                         bool skip_hwpoisoned_pages);
   7void set_pageblock_migratetype(struct page *page, int migratetype);
   8int move_freepages_block(struct zone *zone, struct page *page,
   9                                int migratetype);
  10int 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 */
  23int
  24start_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 */
  31int
  32undo_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 */
  38int 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 */
  44int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages);
  45void unset_migratetype_isolate(struct page *page, unsigned migratetype);
  46struct page *alloc_migrate_target(struct page *page, unsigned long private,
  47                                int **resultp);
  48
  49#endif
  50
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