1 #ifndef _LINUX_MIGRATE_H
2 #define _LINUX_MIGRATE_H
5 #include <linux/mempolicy.h>
6 #include <linux/migrate_mode.h>
8 typedef struct page
*new_page_t(struct page
*page
, unsigned long private,
10 typedef void free_page_t(struct page
*page
, unsigned long private);
13 * Return values from addresss_space_operations.migratepage():
14 * - negative errno on page migration failure;
15 * - zero on page migration success;
17 #define MIGRATEPAGE_SUCCESS 0
23 MR_SYSCALL
, /* also applies to cpusets */
29 #ifdef CONFIG_MIGRATION
31 extern void putback_movable_pages(struct list_head
*l
);
32 extern int migrate_page(struct address_space
*,
33 struct page
*, struct page
*, enum migrate_mode
);
34 extern int migrate_pages(struct list_head
*l
, new_page_t
new, free_page_t free
,
35 unsigned long private, enum migrate_mode mode
, int reason
);
37 extern int migrate_prep(void);
38 extern int migrate_prep_local(void);
39 extern int migrate_vmas(struct mm_struct
*mm
,
40 const nodemask_t
*from
, const nodemask_t
*to
,
42 extern void migrate_page_copy(struct page
*newpage
, struct page
*page
);
43 extern int migrate_huge_page_move_mapping(struct address_space
*mapping
,
44 struct page
*newpage
, struct page
*page
);
45 extern int migrate_page_move_mapping(struct address_space
*mapping
,
46 struct page
*newpage
, struct page
*page
,
47 struct buffer_head
*head
, enum migrate_mode mode
,
51 static inline void putback_movable_pages(struct list_head
*l
) {}
52 static inline int migrate_pages(struct list_head
*l
, new_page_t
new,
53 free_page_t free
, unsigned long private, enum migrate_mode mode
,
57 static inline int migrate_prep(void) { return -ENOSYS
; }
58 static inline int migrate_prep_local(void) { return -ENOSYS
; }
60 static inline int migrate_vmas(struct mm_struct
*mm
,
61 const nodemask_t
*from
, const nodemask_t
*to
,
67 static inline void migrate_page_copy(struct page
*newpage
,
70 static inline int migrate_huge_page_move_mapping(struct address_space
*mapping
,
71 struct page
*newpage
, struct page
*page
)
76 #endif /* CONFIG_MIGRATION */
78 #ifdef CONFIG_NUMA_BALANCING
79 extern bool pmd_trans_migrating(pmd_t pmd
);
80 extern void wait_migrate_huge_page(struct anon_vma
*anon_vma
, pmd_t
*pmd
);
81 extern int migrate_misplaced_page(struct page
*page
,
82 struct vm_area_struct
*vma
, int node
);
83 extern bool migrate_ratelimited(int node
);
85 static inline bool pmd_trans_migrating(pmd_t pmd
)
89 static inline void wait_migrate_huge_page(struct anon_vma
*anon_vma
, pmd_t
*pmd
)
92 static inline int migrate_misplaced_page(struct page
*page
,
93 struct vm_area_struct
*vma
, int node
)
95 return -EAGAIN
; /* can't migrate now */
97 static inline bool migrate_ratelimited(int node
)
101 #endif /* CONFIG_NUMA_BALANCING */
103 #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
104 extern int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
105 struct vm_area_struct
*vma
,
106 pmd_t
*pmd
, pmd_t entry
,
107 unsigned long address
,
108 struct page
*page
, int node
);
110 static inline int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
111 struct vm_area_struct
*vma
,
112 pmd_t
*pmd
, pmd_t entry
,
113 unsigned long address
,
114 struct page
*page
, int node
)
118 #endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
120 #endif /* _LINUX_MIGRATE_H */
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