projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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); |
| 2d1db3b1 | 36 | extern int migrate_page(struct address_space *, |
| a6bc32b8 | 37 | struct page *, struct page *, enum migrate_mode); |
| 68711a74 | 38 | extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free, |
| 9c620e2b | 39 | unsigned long private, enum migrate_mode mode, int reason); |
| 9e5bcd61 | 40 | extern int isolate_movable_page(struct page *page, isolate_mode_t mode); |
| bda807d4 | 41 | extern void putback_movable_page(struct page *page); |
| 95a402c3 | 42 | |
| b20a3503 | 43 | extern int migrate_prep(void); |
| 748446bb | 44 | extern int migrate_prep_local(void); |
| 290408d4 NH |
45 | extern void migrate_page_copy(struct page *newpage, struct page *page); |
| 46 | extern int migrate_huge_page_move_mapping(struct address_space *mapping, | |
| 47 | struct page *newpage, struct page *page); | |
| 36bc08cc GZ |
48 | extern int migrate_page_move_mapping(struct address_space *mapping, |
| 49 | struct page *newpage, struct page *page, | |
| 8e321fef BL |
50 | struct buffer_head *head, enum migrate_mode mode, |
| 51 | int extra_count); | |
| b20a3503 | 52 | #else |
| 64cdd548 | 53 | |
| 5733c7d1 | 54 | static inline void putback_movable_pages(struct list_head *l) {} |
| 68711a74 DR |
55 | static inline int migrate_pages(struct list_head *l, new_page_t new, |
| 56 | free_page_t free, unsigned long private, enum migrate_mode mode, | |
| 57 | int reason) | |
| 9c620e2b | 58 | { return -ENOSYS; } |
| cbae0170 YX |
59 | static inline int isolate_movable_page(struct page *page, isolate_mode_t mode) |
| 60 | { return -EBUSY; } | |
| 9bf9e89c | 61 | |
| b20a3503 | 62 | static inline int migrate_prep(void) { return -ENOSYS; } |
| 748446bb | 63 | static inline int migrate_prep_local(void) { return -ENOSYS; } |
| b20a3503 | 64 | |
| 290408d4 NH |
65 | static inline void migrate_page_copy(struct page *newpage, |
| 66 | struct page *page) {} | |
| 67 | ||
| 6f39ce05 | 68 | static inline int migrate_huge_page_move_mapping(struct address_space *mapping, |
| 290408d4 NH |
69 | struct page *newpage, struct page *page) |
| 70 | { | |
| 71 | return -ENOSYS; | |
| 72 | } | |
| 73 | ||
| b20a3503 | 74 | #endif /* CONFIG_MIGRATION */ |
| 7039e1db | 75 | |
| dd4123f3 MK |
76 | #ifdef CONFIG_COMPACTION |
| 77 | extern int PageMovable(struct page *page); | |
| 78 | extern void __SetPageMovable(struct page *page, struct address_space *mapping); | |
| 79 | extern void __ClearPageMovable(struct page *page); | |
| 80 | #else | |
| 81 | static inline int PageMovable(struct page *page) { return 0; }; | |
| 82 | static inline void __SetPageMovable(struct page *page, | |
| 83 | struct address_space *mapping) | |
| 84 | { | |
| 85 | } | |
| 86 | static inline void __ClearPageMovable(struct page *page) | |
| 87 | { | |
| 88 | } | |
| 89 | #endif | |
| 90 | ||
| 7039e1db | 91 | #ifdef CONFIG_NUMA_BALANCING |
| de466bd6 | 92 | extern bool pmd_trans_migrating(pmd_t pmd); |
| 1bc115d8 MG |
93 | extern int migrate_misplaced_page(struct page *page, |
| 94 | struct vm_area_struct *vma, int node); | |
| 7039e1db | 95 | #else |
| de466bd6 MG |
96 | static inline bool pmd_trans_migrating(pmd_t pmd) |
| 97 | { | |
| 98 | return false; | |
| 99 | } | |
| 1bc115d8 MG |
100 | static inline int migrate_misplaced_page(struct page *page, |
| 101 | struct vm_area_struct *vma, int node) | |
| 7039e1db PZ |
102 | { |
| 103 | return -EAGAIN; /* can't migrate now */ | |
| 104 | } | |
| 220018d3 | 105 | #endif /* CONFIG_NUMA_BALANCING */ |
| b32967ff | 106 | |
| 220018d3 MG |
107 | #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE) |
| 108 | extern int migrate_misplaced_transhuge_page(struct mm_struct *mm, | |
| 109 | struct vm_area_struct *vma, | |
| 110 | pmd_t *pmd, pmd_t entry, | |
| 111 | unsigned long address, | |
| 112 | struct page *page, int node); | |
| 113 | #else | |
| b32967ff MG |
114 | static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm, |
| 115 | struct vm_area_struct *vma, | |
| 116 | pmd_t *pmd, pmd_t entry, | |
| 117 | unsigned long address, | |
| 118 | struct page *page, int node) | |
| 119 | { | |
| 120 | return -EAGAIN; | |
| 121 | } | |
| 220018d3 | 122 | #endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/ |
| 7039e1db | 123 | |
| b20a3503 | 124 | #endif /* _LINUX_MIGRATE_H */ |