1 #ifndef __LINUX_PAGEISOLATION_H
2 #define __LINUX_PAGEISOLATION_H
3
4 #ifdef CONFIG_MEMORY_ISOLATION
has_isolate_pageblock(struct zone * zone)5 static inline bool has_isolate_pageblock(struct zone *zone)
6 {
7 return zone->nr_isolate_pageblock;
8 }
is_migrate_isolate_page(struct page * page)9 static inline bool is_migrate_isolate_page(struct page *page)
10 {
11 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
12 }
is_migrate_isolate(int migratetype)13 static inline bool is_migrate_isolate(int migratetype)
14 {
15 return migratetype == MIGRATE_ISOLATE;
16 }
17 #else
has_isolate_pageblock(struct zone * zone)18 static inline bool has_isolate_pageblock(struct zone *zone)
19 {
20 return false;
21 }
is_migrate_isolate_page(struct page * page)22 static inline bool is_migrate_isolate_page(struct page *page)
23 {
24 return false;
25 }
is_migrate_isolate(int migratetype)26 static inline bool is_migrate_isolate(int migratetype)
27 {
28 return false;
29 }
30 #endif
31
32 bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
33 bool skip_hwpoisoned_pages);
34 void set_pageblock_migratetype(struct page *page, int migratetype);
35 int move_freepages_block(struct zone *zone, struct page *page,
36 int migratetype);
37 int move_freepages(struct zone *zone,
38 struct page *start_page, struct page *end_page,
39 int migratetype);
40
41 /*
42 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
43 * If specified range includes migrate types other than MOVABLE or CMA,
44 * this will fail with -EBUSY.
45 *
46 * For isolating all pages in the range finally, the caller have to
47 * free all pages in the range. test_page_isolated() can be used for
48 * test it.
49 */
50 int
51 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
52 unsigned migratetype, bool skip_hwpoisoned_pages);
53
54 /*
55 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
56 * target range is [start_pfn, end_pfn)
57 */
58 int
59 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
60 unsigned migratetype);
61
62 /*
63 * Test all pages in [start_pfn, end_pfn) are isolated or not.
64 */
65 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
66 bool skip_hwpoisoned_pages);
67
68 /*
69 * Internal functions. Changes pageblock's migrate type.
70 */
71 int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages);
72 void unset_migratetype_isolate(struct page *page, unsigned migratetype);
73 struct page *alloc_migrate_target(struct page *page, unsigned long private,
74 int **resultp);
75
76 #endif
77