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1 | #ifndef __LINUX_PAGEISOLATION_H | |
2 | #define __LINUX_PAGEISOLATION_H | |
3 | ||
4 | #ifdef CONFIG_MEMORY_ISOLATION | |
5 | static inline bool has_isolate_pageblock(struct zone *zone) | |
6 | { | |
7 | return zone->nr_isolate_pageblock; | |
8 | } | |
9 | static inline bool is_migrate_isolate_page(struct page *page) | |
10 | { | |
11 | return get_pageblock_migratetype(page) == MIGRATE_ISOLATE; | |
12 | } | |
13 | static inline bool is_migrate_isolate(int migratetype) | |
14 | { | |
15 | return migratetype == MIGRATE_ISOLATE; | |
16 | } | |
17 | #else | |
18 | static inline bool has_isolate_pageblock(struct zone *zone) | |
19 | { | |
20 | return false; | |
21 | } | |
22 | static inline bool is_migrate_isolate_page(struct page *page) | |
23 | { | |
24 | return false; | |
25 | } | |
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 |