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106 lines
3.2 KiB
106 lines
3.2 KiB
#ifndef _LINUX_MIGRATE_H |
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#define _LINUX_MIGRATE_H |
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#include <linux/mm.h> |
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#include <linux/mempolicy.h> |
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#include <linux/migrate_mode.h> |
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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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/* |
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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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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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#ifdef CONFIG_MIGRATION |
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extern int migrate_replace_page(struct page *oldpage, struct page *newpage); |
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extern void putback_movable_pages(struct list_head *l); |
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extern int migrate_page(struct address_space *, |
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struct page *, struct page *, enum migrate_mode); |
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extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free, |
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unsigned long private, enum migrate_mode mode, int reason); |
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extern int migrate_prep(void); |
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extern int migrate_prep_local(void); |
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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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extern int migrate_page_move_mapping(struct address_space *mapping, |
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struct page *newpage, struct page *page, |
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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 int migrate_replace_page(struct page *oldpage, |
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struct page *newpage) { return -ENOSYS; } |
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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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static inline int migrate_prep(void) { return -ENOSYS; } |
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static inline int migrate_prep_local(void) { return -ENOSYS; } |
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static inline void migrate_page_copy(struct page *newpage, |
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struct page *page) {} |
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static inline int migrate_huge_page_move_mapping(struct address_space *mapping, |
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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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#endif /* CONFIG_MIGRATION */ |
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#ifdef CONFIG_NUMA_BALANCING |
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extern bool pmd_trans_migrating(pmd_t pmd); |
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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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#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 int migrate_misplaced_page(struct page *page, |
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struct vm_area_struct *vma, int node) |
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{ |
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return -EAGAIN; /* can't migrate now */ |
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} |
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#endif /* CONFIG_NUMA_BALANCING */ |
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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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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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#endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/ |
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#endif /* _LINUX_MIGRATE_H */
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