]>
git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/linux/migrate.h
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 void migrate_page_copy(struct page
*newpage
, struct page
*page
);
40 extern int migrate_huge_page_move_mapping(struct address_space
*mapping
,
41 struct page
*newpage
, struct page
*page
);
42 extern int migrate_page_move_mapping(struct address_space
*mapping
,
43 struct page
*newpage
, struct page
*page
,
44 struct buffer_head
*head
, enum migrate_mode mode
,
48 static inline void putback_movable_pages(struct list_head
*l
) {}
49 static inline int migrate_pages(struct list_head
*l
, new_page_t
new,
50 free_page_t free
, unsigned long private, enum migrate_mode mode
,
54 static inline int migrate_prep(void) { return -ENOSYS
; }
55 static inline int migrate_prep_local(void) { return -ENOSYS
; }
57 static inline void migrate_page_copy(struct page
*newpage
,
60 static inline int migrate_huge_page_move_mapping(struct address_space
*mapping
,
61 struct page
*newpage
, struct page
*page
)
66 #endif /* CONFIG_MIGRATION */
68 #ifdef CONFIG_NUMA_BALANCING
69 extern bool pmd_trans_migrating(pmd_t pmd
);
70 extern void wait_migrate_huge_page(struct anon_vma
*anon_vma
, pmd_t
*pmd
);
71 extern int migrate_misplaced_page(struct page
*page
,
72 struct vm_area_struct
*vma
, int node
);
73 extern bool migrate_ratelimited(int node
);
75 static inline bool pmd_trans_migrating(pmd_t pmd
)
79 static inline void wait_migrate_huge_page(struct anon_vma
*anon_vma
, pmd_t
*pmd
)
82 static inline int migrate_misplaced_page(struct page
*page
,
83 struct vm_area_struct
*vma
, int node
)
85 return -EAGAIN
; /* can't migrate now */
87 static inline bool migrate_ratelimited(int node
)
91 #endif /* CONFIG_NUMA_BALANCING */
93 #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
94 extern int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
95 struct vm_area_struct
*vma
,
96 pmd_t
*pmd
, pmd_t entry
,
97 unsigned long address
,
98 struct page
*page
, int node
);
100 static inline int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
101 struct vm_area_struct
*vma
,
102 pmd_t
*pmd
, pmd_t entry
,
103 unsigned long address
,
104 struct page
*page
, int node
)
108 #endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
110 #endif /* _LINUX_MIGRATE_H */