| 1 | #ifndef __LINUX_PAGEISOLATION_H |
| 2 | #define __LINUX_PAGEISOLATION_H |
| 3 | |
| 4 | #ifdef CONFIG_MEMORY_ISOLATION |
| 5 | static inline bool is_migrate_isolate_page(struct page *page) |
| 6 | { |
| 7 | return get_pageblock_migratetype(page) == MIGRATE_ISOLATE; |
| 8 | } |
| 9 | static inline bool is_migrate_isolate(int migratetype) |
| 10 | { |
| 11 | return migratetype == MIGRATE_ISOLATE; |
| 12 | } |
| 13 | #else |
| 14 | static inline bool is_migrate_isolate_page(struct page *page) |
| 15 | { |
| 16 | return false; |
| 17 | } |
| 18 | static inline bool is_migrate_isolate(int migratetype) |
| 19 | { |
| 20 | return false; |
| 21 | } |
| 22 | #endif |
| 23 | |
| 24 | bool has_unmovable_pages(struct zone *zone, struct page *page, int count, |
| 25 | bool skip_hwpoisoned_pages); |
| 26 | void set_pageblock_migratetype(struct page *page, int migratetype); |
| 27 | int move_freepages_block(struct zone *zone, struct page *page, |
| 28 | int migratetype); |
| 29 | int move_freepages(struct zone *zone, |
| 30 | struct page *start_page, struct page *end_page, |
| 31 | int migratetype); |
| 32 | |
| 33 | /* |
| 34 | * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. |
| 35 | * If specified range includes migrate types other than MOVABLE or CMA, |
| 36 | * this will fail with -EBUSY. |
| 37 | * |
| 38 | * For isolating all pages in the range finally, the caller have to |
| 39 | * free all pages in the range. test_page_isolated() can be used for |
| 40 | * test it. |
| 41 | */ |
| 42 | int |
| 43 | start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, |
| 44 | unsigned migratetype, bool skip_hwpoisoned_pages); |
| 45 | |
| 46 | /* |
| 47 | * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. |
| 48 | * target range is [start_pfn, end_pfn) |
| 49 | */ |
| 50 | int |
| 51 | undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, |
| 52 | unsigned migratetype); |
| 53 | |
| 54 | /* |
| 55 | * Test all pages in [start_pfn, end_pfn) are isolated or not. |
| 56 | */ |
| 57 | int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, |
| 58 | bool skip_hwpoisoned_pages); |
| 59 | |
| 60 | /* |
| 61 | * Internal functions. Changes pageblock's migrate type. |
| 62 | */ |
| 63 | int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages); |
| 64 | void unset_migratetype_isolate(struct page *page, unsigned migratetype); |
| 65 | struct page *alloc_migrate_target(struct page *page, unsigned long private, |
| 66 | int **resultp); |
| 67 | |
| 68 | #endif |