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git.proxmox.com Git - mirror_ubuntu-bionic-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>
7 #include <linux/hugetlb.h>
9 typedef struct page
*new_page_t(struct page
*page
, unsigned long private,
11 typedef void free_page_t(struct page
*page
, unsigned long private);
14 * Return values from addresss_space_operations.migratepage():
15 * - negative errno on page migration failure;
16 * - zero on page migration success;
18 #define MIGRATEPAGE_SUCCESS 0
24 MR_SYSCALL
, /* also applies to cpusets */
31 /* In mm/debug.c; also keep sync with include/trace/events/migrate.h */
32 extern char *migrate_reason_names
[MR_TYPES
];
34 static inline struct page
*new_page_nodemask(struct page
*page
,
35 int preferred_nid
, nodemask_t
*nodemask
)
37 gfp_t gfp_mask
= GFP_USER
| __GFP_MOVABLE
;
40 return alloc_huge_page_nodemask(page_hstate(compound_head(page
)),
41 preferred_nid
, nodemask
);
43 if (PageHighMem(page
) || (zone_idx(page_zone(page
)) == ZONE_MOVABLE
))
44 gfp_mask
|= __GFP_HIGHMEM
;
46 return __alloc_pages_nodemask(gfp_mask
, 0, preferred_nid
, nodemask
);
49 #ifdef CONFIG_MIGRATION
51 extern void putback_movable_pages(struct list_head
*l
);
52 extern int migrate_page(struct address_space
*mapping
,
53 struct page
*newpage
, struct page
*page
,
54 enum migrate_mode mode
);
55 extern int migrate_pages(struct list_head
*l
, new_page_t
new, free_page_t free
,
56 unsigned long private, enum migrate_mode mode
, int reason
);
57 extern int isolate_movable_page(struct page
*page
, isolate_mode_t mode
);
58 extern void putback_movable_page(struct page
*page
);
60 extern int migrate_prep(void);
61 extern int migrate_prep_local(void);
62 extern void migrate_page_copy(struct page
*newpage
, struct page
*page
);
63 extern int migrate_huge_page_move_mapping(struct address_space
*mapping
,
64 struct page
*newpage
, struct page
*page
);
65 extern int migrate_page_move_mapping(struct address_space
*mapping
,
66 struct page
*newpage
, struct page
*page
,
67 struct buffer_head
*head
, enum migrate_mode mode
,
71 static inline void putback_movable_pages(struct list_head
*l
) {}
72 static inline int migrate_pages(struct list_head
*l
, new_page_t
new,
73 free_page_t free
, unsigned long private, enum migrate_mode mode
,
76 static inline int isolate_movable_page(struct page
*page
, isolate_mode_t mode
)
79 static inline int migrate_prep(void) { return -ENOSYS
; }
80 static inline int migrate_prep_local(void) { return -ENOSYS
; }
82 static inline void migrate_page_copy(struct page
*newpage
,
85 static inline int migrate_huge_page_move_mapping(struct address_space
*mapping
,
86 struct page
*newpage
, struct page
*page
)
91 #endif /* CONFIG_MIGRATION */
93 #ifdef CONFIG_COMPACTION
94 extern int PageMovable(struct page
*page
);
95 extern void __SetPageMovable(struct page
*page
, struct address_space
*mapping
);
96 extern void __ClearPageMovable(struct page
*page
);
98 static inline int PageMovable(struct page
*page
) { return 0; };
99 static inline void __SetPageMovable(struct page
*page
,
100 struct address_space
*mapping
)
103 static inline void __ClearPageMovable(struct page
*page
)
108 #ifdef CONFIG_NUMA_BALANCING
109 extern bool pmd_trans_migrating(pmd_t pmd
);
110 extern int migrate_misplaced_page(struct page
*page
,
111 struct vm_area_struct
*vma
, int node
);
113 static inline bool pmd_trans_migrating(pmd_t pmd
)
117 static inline int migrate_misplaced_page(struct page
*page
,
118 struct vm_area_struct
*vma
, int node
)
120 return -EAGAIN
; /* can't migrate now */
122 #endif /* CONFIG_NUMA_BALANCING */
124 #if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
125 extern int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
126 struct vm_area_struct
*vma
,
127 pmd_t
*pmd
, pmd_t entry
,
128 unsigned long address
,
129 struct page
*page
, int node
);
131 static inline int migrate_misplaced_transhuge_page(struct mm_struct
*mm
,
132 struct vm_area_struct
*vma
,
133 pmd_t
*pmd
, pmd_t entry
,
134 unsigned long address
,
135 struct page
*page
, int node
)
139 #endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
141 #endif /* _LINUX_MIGRATE_H */