diff options
Diffstat (limited to 'include/linux/migrate.h')
| -rw-r--r-- | include/linux/migrate.h | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 0b5865c61efd..1e9f627967a3 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -23,6 +23,15 @@ typedef struct page *new_page_t(struct page *, unsigned long private, int **); #define MIGRATEPAGE_BALLOON_SUCCESS 1 /* special ret code for balloon page * sucessful migration case. */ +enum migrate_reason { + MR_COMPACTION, + MR_MEMORY_FAILURE, + MR_MEMORY_HOTPLUG, + MR_SYSCALL, /* also applies to cpusets */ + MR_MEMPOLICY_MBIND, + MR_NUMA_MISPLACED, + MR_CMA +}; #ifdef CONFIG_MIGRATION @@ -32,7 +41,7 @@ extern int migrate_page(struct address_space *, struct page *, struct page *, enum migrate_mode); extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - enum migrate_mode mode); + enum migrate_mode mode, int reason); extern int migrate_huge_page(struct page *, new_page_t x, unsigned long private, bool offlining, enum migrate_mode mode); @@ -54,7 +63,7 @@ static inline void putback_lru_pages(struct list_head *l) {} static inline void putback_movable_pages(struct list_head *l) {} static inline int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - enum migrate_mode mode) { return -ENOSYS; } + enum migrate_mode mode, int reason) { return -ENOSYS; } static inline int migrate_huge_page(struct page *page, new_page_t x, unsigned long private, bool offlining, enum migrate_mode mode) { return -ENOSYS; } @@ -83,4 +92,37 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping, #define fail_migrate_page NULL #endif /* CONFIG_MIGRATION */ + +#ifdef CONFIG_NUMA_BALANCING +extern int migrate_misplaced_page(struct page *page, int node); +extern int migrate_misplaced_page(struct page *page, int node); +extern bool migrate_ratelimited(int node); +#else +static inline int migrate_misplaced_page(struct page *page, int node) +{ + return -EAGAIN; /* can't migrate now */ +} +static inline bool migrate_ratelimited(int node) +{ + return false; +} +#endif /* CONFIG_NUMA_BALANCING */ + +#if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE) +extern int migrate_misplaced_transhuge_page(struct mm_struct *mm, + struct vm_area_struct *vma, + pmd_t *pmd, pmd_t entry, + unsigned long address, + struct page *page, int node); +#else +static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm, + struct vm_area_struct *vma, + pmd_t *pmd, pmd_t entry, + unsigned long address, + struct page *page, int node) +{ + return -EAGAIN; +} +#endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/ + #endif /* _LINUX_MIGRATE_H */ |