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 69