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page-isolation.h
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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