diff options
Diffstat (limited to 'include/linux/migrate.h')
| -rw-r--r-- | include/linux/migrate.h | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 82b1faf..1a1fcfd 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -6,20 +6,33 @@ typedef struct page *new_page_t(struct page *, unsigned long private, int **); +/* + * MIGRATE_ASYNC means never block + * MIGRATE_SYNC_LIGHT in the current implementation means to allow blocking + * on most operations but not ->writepage as the potential stall time + * is too significant + * MIGRATE_SYNC will block when migrating pages + */ +enum migrate_mode { + MIGRATE_ASYNC, + MIGRATE_SYNC_LIGHT, + MIGRATE_SYNC, +}; + #ifdef CONFIG_MIGRATION #define PAGE_MIGRATION 1 extern void putback_lru_pages(struct list_head *l); extern int migrate_page(struct address_space *, - struct page *, struct page *); + struct page *, struct page *, enum migrate_mode); #ifndef CONFIG_DMA_CMA extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - bool sync); + enum migrate_mode mode); #else extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - bool sync, int tries); + enum migrate_mode mode, int tries); extern int migrate_replace_cma_page(struct page *oldpage, struct page **newpage); @@ -27,7 +40,7 @@ extern int migrate_replace_cma_page(struct page *oldpage, extern int migrate_huge_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - bool sync); + enum migrate_mode mode); extern int fail_migrate_page(struct address_space *, struct page *, struct page *); @@ -47,6 +60,7 @@ static inline void putback_lru_pages(struct list_head *l) {} #ifndef CONFIG_DMA_CMA static inline int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, +<<<<<<< HEAD bool sync) { return -ENOSYS; } #else static inline int migrate_pages(struct list_head *l, new_page_t x, @@ -57,9 +71,12 @@ static inline int migrate_replace_cma_page(struct page *oldpage, struct page **newpage) { return -ENOSYS; } #endif +======= + enum migrate_mode mode) { return -ENOSYS; } +>>>>>>> 54ea5b40f067cf098cac639973c6628c6944cfb2 static inline int migrate_huge_pages(struct list_head *l, new_page_t x, unsigned long private, bool offlining, - bool sync) { return -ENOSYS; } + enum migrate_mode mode) { return -ENOSYS; } static inline int migrate_prep(void) { return -ENOSYS; } static inline int migrate_prep_local(void) { return -ENOSYS; } |