2006-03-22 15:09:12 +07:00
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#ifndef _LINUX_MIGRATE_H
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#define _LINUX_MIGRATE_H
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#include <linux/mm.h>
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2007-05-07 04:50:20 +07:00
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#include <linux/mempolicy.h>
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2012-01-21 05:33:53 +07:00
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#include <linux/migrate_mode.h>
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2006-03-22 15:09:12 +07:00
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2014-06-05 06:08:25 +07:00
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typedef struct page *new_page_t(struct page *page, unsigned long private,
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int **reason);
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typedef void free_page_t(struct page *page, unsigned long private);
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2006-06-23 16:03:53 +07:00
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2012-12-12 07:02:31 +07:00
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/*
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* Return values from addresss_space_operations.migratepage():
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* - negative errno on page migration failure;
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* - zero on page migration success;
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*/
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#define MIGRATEPAGE_SUCCESS 0
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2014-10-10 05:29:27 +07:00
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2012-10-19 20:07:31 +07:00
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enum migrate_reason {
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MR_COMPACTION,
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MR_MEMORY_FAILURE,
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MR_MEMORY_HOTPLUG,
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MR_SYSCALL, /* also applies to cpusets */
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MR_MEMPOLICY_MBIND,
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MR_NUMA_MISPLACED,
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MR_CMA
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};
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2012-12-12 07:02:31 +07:00
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2007-05-07 04:50:20 +07:00
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#ifdef CONFIG_MIGRATION
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2009-01-07 05:39:16 +07:00
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2012-12-12 07:02:47 +07:00
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extern void putback_movable_pages(struct list_head *l);
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2006-06-23 16:03:33 +07:00
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extern int migrate_page(struct address_space *,
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2012-01-13 08:19:43 +07:00
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struct page *, struct page *, enum migrate_mode);
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2014-06-05 06:08:25 +07:00
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extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free,
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2013-02-23 07:35:14 +07:00
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unsigned long private, enum migrate_mode mode, int reason);
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2006-06-23 16:03:53 +07:00
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2006-03-22 15:09:12 +07:00
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extern int migrate_prep(void);
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2010-05-25 04:32:27 +07:00
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extern int migrate_prep_local(void);
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2006-06-25 19:46:48 +07:00
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extern int migrate_vmas(struct mm_struct *mm,
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const nodemask_t *from, const nodemask_t *to,
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unsigned long flags);
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2010-09-08 08:19:35 +07:00
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extern void migrate_page_copy(struct page *newpage, struct page *page);
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extern int migrate_huge_page_move_mapping(struct address_space *mapping,
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struct page *newpage, struct page *page);
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2013-07-16 16:56:16 +07:00
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extern int migrate_page_move_mapping(struct address_space *mapping,
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struct page *newpage, struct page *page,
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2013-12-22 05:56:08 +07:00
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struct buffer_head *head, enum migrate_mode mode,
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int extra_count);
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#else
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static inline void putback_movable_pages(struct list_head *l) {}
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static inline int migrate_pages(struct list_head *l, new_page_t new,
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free_page_t free, unsigned long private, enum migrate_mode mode,
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int reason)
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{ return -ENOSYS; }
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2006-03-31 17:29:56 +07:00
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2006-03-22 15:09:12 +07:00
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static inline int migrate_prep(void) { return -ENOSYS; }
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2010-05-25 04:32:27 +07:00
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static inline int migrate_prep_local(void) { return -ENOSYS; }
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2006-03-22 15:09:12 +07:00
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2006-06-25 19:46:48 +07:00
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static inline int migrate_vmas(struct mm_struct *mm,
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const nodemask_t *from, const nodemask_t *to,
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unsigned long flags)
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{
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return -ENOSYS;
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}
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2010-09-08 08:19:35 +07:00
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static inline void migrate_page_copy(struct page *newpage,
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struct page *page) {}
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2010-09-30 09:54:51 +07:00
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static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
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2010-09-08 08:19:35 +07:00
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struct page *newpage, struct page *page)
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{
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return -ENOSYS;
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}
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2006-03-22 15:09:12 +07:00
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#endif /* CONFIG_MIGRATION */
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2012-10-25 19:16:34 +07:00
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#ifdef CONFIG_NUMA_BALANCING
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2013-12-19 08:08:42 +07:00
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extern bool pmd_trans_migrating(pmd_t pmd);
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extern void wait_migrate_huge_page(struct anon_vma *anon_vma, pmd_t *pmd);
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2013-10-07 17:29:05 +07:00
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extern int migrate_misplaced_page(struct page *page,
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struct vm_area_struct *vma, int node);
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2012-11-19 17:59:15 +07:00
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extern bool migrate_ratelimited(int node);
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#else
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static inline bool pmd_trans_migrating(pmd_t pmd)
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{
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return false;
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}
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static inline void wait_migrate_huge_page(struct anon_vma *anon_vma, pmd_t *pmd)
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{
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}
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2013-10-07 17:29:05 +07:00
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static inline int migrate_misplaced_page(struct page *page,
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struct vm_area_struct *vma, int node)
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2012-10-25 19:16:34 +07:00
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{
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return -EAGAIN; /* can't migrate now */
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}
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2012-11-19 17:59:15 +07:00
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static inline bool migrate_ratelimited(int node)
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{
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return false;
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}
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2012-12-05 16:32:56 +07:00
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#endif /* CONFIG_NUMA_BALANCING */
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2012-11-19 19:35:47 +07:00
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2012-12-05 16:32:56 +07:00
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#if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
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extern int migrate_misplaced_transhuge_page(struct mm_struct *mm,
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struct vm_area_struct *vma,
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pmd_t *pmd, pmd_t entry,
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unsigned long address,
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struct page *page, int node);
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#else
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2012-11-19 19:35:47 +07:00
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static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm,
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struct vm_area_struct *vma,
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pmd_t *pmd, pmd_t entry,
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unsigned long address,
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struct page *page, int node)
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{
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return -EAGAIN;
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}
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2012-12-05 16:32:56 +07:00
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#endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
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2012-10-25 19:16:34 +07:00
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2006-03-22 15:09:12 +07:00
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#endif /* _LINUX_MIGRATE_H */
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