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 */
30 /* In mm/debug.c; also keep sync with include/trace/events/migrate.h */
31 extern char *migrate_reason_names
[MR_TYPES
];
33 #ifdef CONFIG_MIGRATION
35 extern void putback_movable_pages(struct list_head
*l
);
36 extern int migrate_page(struct address_space
*,
37 struct page
*, struct page
*, enum migrate_mode
);
38 extern int migrate_pages(struct list_head
*l
, new_page_t
new, free_page_t free
,
39 unsigned long private, enum migrate_mode mode
, int reason
);
40 extern bool isolate_movable_page(struct page
*page
, isolate_mode_t mode
);
41 extern void putback_movable_page(struct page
*page
);
43 extern int migrate_prep(void);
44 extern int migrate_prep_local(void);
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
);
48 extern int migrate_page_move_mapping(struct address_space
*mapping
,
49 struct page
*newpage
, struct page
*page
,
50 struct buffer_head
*head
, enum migrate_mode mode
,
54 static inline void putback_movable_pages(struct list_head
*l
) {}
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
,
60 static inline int migrate_prep(void) { return -ENOSYS
; }
61 static inline int migrate_prep_local(void) { return -ENOSYS
; }
63 static inline void migrate_page_copy(struct page
*newpage
,
66 static inline int migrate_huge_page_move_mapping(struct address_space
*mapping
,
67 struct page
*newpage
, struct page
*page
)
72 #endif /* CONFIG_MIGRATION */
74 #ifdef CONFIG_COMPACTION
75 extern int PageMovable(struct page
*page
);
76 extern void __SetPageMovable(struct page
*page
, struct address_space
*mapping
);
77 extern void __ClearPageMovable(struct page
*page
);
79 static inline int PageMovable(struct page
*page
) { return 0; };
80 static inline void __SetPageMovable(struct page
*page
,
81 struct address_space
*mapping
)
84 static inline void __ClearPageMovable(struct page
*page
)
89 #ifdef CONFIG_NUMA_BALANCING
90 extern bool pmd_trans_migrating(pmd_t pmd
);
91 extern int migrate_misplaced_page(struct page
*page
,
92 struct vm_area_struct
*vma
, int node
);
94 static inline bool pmd_trans_migrating(pmd_t pmd
)
98 static inline int migrate_misplaced_page(struct page
*page
,
99 struct vm_area_struct
*vma
, int node
)
101 return -EAGAIN
; /* can't migrate now */
103 #endif /* CONFIG_NUMA_BALANCING */
105 #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
106 extern int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
107 struct vm_area_struct
*vma
,
108 pmd_t
*pmd
, pmd_t entry
,
109 unsigned long address
,
110 struct page
*page
, int node
);
112 static inline int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
113 struct vm_area_struct
*vma
,
114 pmd_t
*pmd
, pmd_t entry
,
115 unsigned long address
,
116 struct page
*page
, int node
)
120 #endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
122 #endif /* _LINUX_MIGRATE_H */