1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_PAGEISOLATION_H 3 #define __LINUX_PAGEISOLATION_H 4 5 #ifdef CONFIG_MEMORY_ISOLATION 6 static inline bool has_isolate_pageblock(struct zone *zone) 7 { 8 return zone->nr_isolate_pageblock; 9 } 10 static inline bool is_migrate_isolate_page(struct page *page) 11 { 12 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE; 13 } 14 static inline bool is_migrate_isolate(int migratetype) 15 { 16 return migratetype == MIGRATE_ISOLATE; 17 } 18 #else 19 static inline bool has_isolate_pageblock(struct zone *zone) 20 { 21 return false; 22 } 23 static inline bool is_migrate_isolate_page(struct page *page) 24 { 25 return false; 26 } 27 static inline bool is_migrate_isolate(int migratetype) 28 { 29 return false; 30 } 31 #endif 32 33 bool has_unmovable_pages(struct zone *zone, struct page *page, int count, 34 int migratetype, bool skip_hwpoisoned_pages); 35 void set_pageblock_migratetype(struct page *page, int migratetype); 36 int move_freepages_block(struct zone *zone, struct page *page, 37 int migratetype, int *num_movable); 38 39 /* 40 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE. 41 * If specified range includes migrate types other than MOVABLE or CMA, 42 * this will fail with -EBUSY. 43 * 44 * For isolating all pages in the range finally, the caller have to 45 * free all pages in the range. test_page_isolated() can be used for 46 * test it. 47 */ 48 int 49 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 50 unsigned migratetype, bool skip_hwpoisoned_pages); 51 52 /* 53 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE. 54 * target range is [start_pfn, end_pfn) 55 */ 56 int 57 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn, 58 unsigned migratetype); 59 60 /* 61 * Test all pages in [start_pfn, end_pfn) are isolated or not. 62 */ 63 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn, 64 bool skip_hwpoisoned_pages); 65 66 struct page *alloc_migrate_target(struct page *page, unsigned long private, 67 int **resultp); 68 69 #endif 70