1 #ifndef __LINUX_PAGEISOLATION_H 2 #define __LINUX_PAGEISOLATION_H 3 4 #ifdef CONFIG_MEMORY_ISOLATION 5 static inline bool has_isolate_pageblock(struct zone *zone) 6 { 7 return zone->nr_isolate_pageblock; 8 } 9 static inline bool is_migrate_isolate_page(struct page *page) 10 { 11 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE; 12 } 13 static inline bool is_migrate_isolate(int migratetype) 14 { 15 return migratetype == MIGRATE_ISOLATE; 16 } 17 #else 18 static inline bool has_isolate_pageblock(struct zone *zone) 19 { 20 return false; 21 } 22 static inline bool is_migrate_isolate_page(struct page *page) 23 { 24 return false; 25 } 26 static inline bool is_migrate_isolate(int migratetype) 27 { 28 return false; 29 } 30 #endif 31 32 bool has_unmovable_pages(struct zone *zone, struct page *page, int count, 33 bool skip_hwpoisoned_pages); 34 void set_pageblock_migratetype(struct page *page, int migratetype); 35 int move_freepages_block(struct zone *zone, struct page *page, 36 int migratetype); 37 int move_freepages(struct zone *zone, 38 struct page *start_page, struct page *end_page, 39 int migratetype); 40 41 /* 42 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. 43 * If specified range includes migrate types other than MOVABLE or CMA, 44 * this will fail with -EBUSY. 45 * 46 * For isolating all pages in the range finally, the caller have to 47 * free all pages in the range. test_page_isolated() can be used for 48 * test it. 49 */ 50 int 51 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 52 unsigned migratetype, bool skip_hwpoisoned_pages); 53 54 /* 55 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. 56 * target range is [start_pfn, end_pfn) 57 */ 58 int 59 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 60 unsigned migratetype); 61 62 /* 63 * Test all pages in [start_pfn, end_pfn) are isolated or not. 64 */ 65 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, 66 bool skip_hwpoisoned_pages); 67 68 /* 69 * Internal functions. Changes pageblock's migrate type. 70 */ 71 int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages); 72 void unset_migratetype_isolate(struct page *page, unsigned migratetype); 73 struct page *alloc_migrate_target(struct page *page, unsigned long private, 74 int **resultp); 75 76 #endif 77