Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_MIGRATE_H
2#define _LINUX_MIGRATE_H
3
4#include <linux/mm.h>
5
6typedef struct page *new_page_t(struct page *, unsigned long private, int **);
7
8/* Check if a vma is migratable */
9static inline int vma_migratable(struct vm_area_struct *vma)
10{
11 if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
12 return 0;
13 return 1;
14}
15
16#ifdef CONFIG_MIGRATION
17extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
18extern int putback_lru_pages(struct list_head *l);
19extern int migrate_page(struct address_space *,
20 struct page *, struct page *);
21extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long);
22
23extern int fail_migrate_page(struct address_space *,
24 struct page *, struct page *);
25
26extern int migrate_prep(void);
27extern int migrate_vmas(struct mm_struct *mm,
28 const nodemask_t *from, const nodemask_t *to,
29 unsigned long flags);
30#else
31
32static inline int isolate_lru_page(struct page *p, struct list_head *list)
33 { return -ENOSYS; }
34static inline int putback_lru_pages(struct list_head *l) { return 0; }
35static inline int migrate_pages(struct list_head *l, new_page_t x,
36 unsigned long private) { return -ENOSYS; }
37
38static inline int migrate_pages_to(struct list_head *pagelist,
39 struct vm_area_struct *vma, int dest) { return 0; }
40
41static inline int migrate_prep(void) { return -ENOSYS; }
42
43static inline int migrate_vmas(struct mm_struct *mm,
44 const nodemask_t *from, const nodemask_t *to,
45 unsigned long flags)
46{
47 return -ENOSYS;
48}
49
50/* Possible settings for the migrate_page() method in address_operations */
51#define migrate_page NULL
52#define fail_migrate_page NULL
53
54#endif /* CONFIG_MIGRATION */
55#endif /* _LINUX_MIGRATE_H */