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Commit | Line | Data |
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b20a3503 CL |
1 | #ifndef _LINUX_MIGRATE_H |
2 | #define _LINUX_MIGRATE_H | |
3 | ||
b20a3503 | 4 | #include <linux/mm.h> |
906e0be1 | 5 | #include <linux/mempolicy.h> |
6536e312 | 6 | #include <linux/migrate_mode.h> |
b20a3503 | 7 | |
68711a74 DR |
8 | typedef struct page *new_page_t(struct page *page, unsigned long private, |
9 | int **reason); | |
10 | typedef void free_page_t(struct page *page, unsigned long private); | |
95a402c3 | 11 | |
78bd5209 RA |
12 | /* |
13 | * Return values from addresss_space_operations.migratepage(): | |
14 | * - negative errno on page migration failure; | |
15 | * - zero on page migration success; | |
16 | */ | |
17 | #define MIGRATEPAGE_SUCCESS 0 | |
d6d86c0a | 18 | |
7b2a2d4a MG |
19 | enum migrate_reason { |
20 | MR_COMPACTION, | |
21 | MR_MEMORY_FAILURE, | |
22 | MR_MEMORY_HOTPLUG, | |
23 | MR_SYSCALL, /* also applies to cpusets */ | |
24 | MR_MEMPOLICY_MBIND, | |
7039e1db | 25 | MR_NUMA_MISPLACED, |
7cd12b4a VB |
26 | MR_CMA, |
27 | MR_TYPES | |
7b2a2d4a | 28 | }; |
78bd5209 | 29 | |
7cd12b4a VB |
30 | /* In mm/debug.c; also keep sync with include/trace/events/migrate.h */ |
31 | extern char *migrate_reason_names[MR_TYPES]; | |
32 | ||
906e0be1 | 33 | #ifdef CONFIG_MIGRATION |
64cdd548 | 34 | |
5733c7d1 | 35 | extern void putback_movable_pages(struct list_head *l); |
9927e388 PJ |
36 | extern int migrate_page(struct address_space *mapping, |
37 | struct page *newpage, struct page *page, | |
38 | enum migrate_mode mode); | |
68711a74 | 39 | extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free, |
9c620e2b | 40 | unsigned long private, enum migrate_mode mode, int reason); |
9e5bcd61 | 41 | extern int isolate_movable_page(struct page *page, isolate_mode_t mode); |
bda807d4 | 42 | extern void putback_movable_page(struct page *page); |
95a402c3 | 43 | |
b20a3503 | 44 | extern int migrate_prep(void); |
748446bb | 45 | extern int migrate_prep_local(void); |
290408d4 NH |
46 | extern void migrate_page_copy(struct page *newpage, struct page *page); |
47 | extern int migrate_huge_page_move_mapping(struct address_space *mapping, | |
48 | struct page *newpage, struct page *page); | |
36bc08cc GZ |
49 | extern int migrate_page_move_mapping(struct address_space *mapping, |
50 | struct page *newpage, struct page *page, | |
8e321fef BL |
51 | struct buffer_head *head, enum migrate_mode mode, |
52 | int extra_count); | |
b20a3503 | 53 | #else |
64cdd548 | 54 | |
5733c7d1 | 55 | static inline void putback_movable_pages(struct list_head *l) {} |
68711a74 DR |
56 | static inline int migrate_pages(struct list_head *l, new_page_t new, |
57 | free_page_t free, unsigned long private, enum migrate_mode mode, | |
58 | int reason) | |
9c620e2b | 59 | { return -ENOSYS; } |
cbae0170 YX |
60 | static inline int isolate_movable_page(struct page *page, isolate_mode_t mode) |
61 | { return -EBUSY; } | |
9bf9e89c | 62 | |
b20a3503 | 63 | static inline int migrate_prep(void) { return -ENOSYS; } |
748446bb | 64 | static inline int migrate_prep_local(void) { return -ENOSYS; } |
b20a3503 | 65 | |
290408d4 NH |
66 | static inline void migrate_page_copy(struct page *newpage, |
67 | struct page *page) {} | |
68 | ||
6f39ce05 | 69 | static inline int migrate_huge_page_move_mapping(struct address_space *mapping, |
290408d4 NH |
70 | struct page *newpage, struct page *page) |
71 | { | |
72 | return -ENOSYS; | |
73 | } | |
74 | ||
b20a3503 | 75 | #endif /* CONFIG_MIGRATION */ |
7039e1db | 76 | |
dd4123f3 MK |
77 | #ifdef CONFIG_COMPACTION |
78 | extern int PageMovable(struct page *page); | |
79 | extern void __SetPageMovable(struct page *page, struct address_space *mapping); | |
80 | extern void __ClearPageMovable(struct page *page); | |
81 | #else | |
82 | static inline int PageMovable(struct page *page) { return 0; }; | |
83 | static inline void __SetPageMovable(struct page *page, | |
84 | struct address_space *mapping) | |
85 | { | |
86 | } | |
87 | static inline void __ClearPageMovable(struct page *page) | |
88 | { | |
89 | } | |
90 | #endif | |
91 | ||
7039e1db | 92 | #ifdef CONFIG_NUMA_BALANCING |
de466bd6 | 93 | extern bool pmd_trans_migrating(pmd_t pmd); |
1bc115d8 MG |
94 | extern int migrate_misplaced_page(struct page *page, |
95 | struct vm_area_struct *vma, int node); | |
7039e1db | 96 | #else |
de466bd6 MG |
97 | static inline bool pmd_trans_migrating(pmd_t pmd) |
98 | { | |
99 | return false; | |
100 | } | |
1bc115d8 MG |
101 | static inline int migrate_misplaced_page(struct page *page, |
102 | struct vm_area_struct *vma, int node) | |
7039e1db PZ |
103 | { |
104 | return -EAGAIN; /* can't migrate now */ | |
105 | } | |
220018d3 | 106 | #endif /* CONFIG_NUMA_BALANCING */ |
b32967ff | 107 | |
220018d3 MG |
108 | #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE) |
109 | extern int migrate_misplaced_transhuge_page(struct mm_struct *mm, | |
110 | struct vm_area_struct *vma, | |
111 | pmd_t *pmd, pmd_t entry, | |
112 | unsigned long address, | |
113 | struct page *page, int node); | |
114 | #else | |
b32967ff MG |
115 | static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm, |
116 | struct vm_area_struct *vma, | |
117 | pmd_t *pmd, pmd_t entry, | |
118 | unsigned long address, | |
119 | struct page *page, int node) | |
120 | { | |
121 | return -EAGAIN; | |
122 | } | |
220018d3 | 123 | #endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/ |
7039e1db | 124 | |
b20a3503 | 125 | #endif /* _LINUX_MIGRATE_H */ |