1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_PAGEISOLATION_H
3 #define __LINUX_PAGEISOLATION_H
5 #ifdef CONFIG_MEMORY_ISOLATION
6 static inline bool has_isolate_pageblock(struct zone *zone)
8 return zone->nr_isolate_pageblock;
10 static inline bool is_migrate_isolate_page(struct page *page)
12 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
14 static inline bool is_migrate_isolate(int migratetype)
16 return migratetype == MIGRATE_ISOLATE;
19 static inline bool has_isolate_pageblock(struct zone *zone)
23 static inline bool is_migrate_isolate_page(struct page *page)
27 static inline bool is_migrate_isolate(int migratetype)
33 #define SKIP_HWPOISON 0x1
34 #define REPORT_FAILURE 0x2
36 bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
37 int migratetype, int flags);
38 void set_pageblock_migratetype(struct page *page, int migratetype);
39 int move_freepages_block(struct zone *zone, struct page *page,
40 int migratetype, int *num_movable);
43 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
44 * If specified range includes migrate types other than MOVABLE or CMA,
45 * this will fail with -EBUSY.
47 * For isolating all pages in the range finally, the caller have to
48 * free all pages in the range. test_page_isolated() can be used for
51 * The following flags are allowed (they can be combined in a bit mask)
52 * SKIP_HWPOISON - ignore hwpoison pages
53 * REPORT_FAILURE - report details about the failure to isolate the range
56 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
57 unsigned migratetype, int flags);
60 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
61 * target range is [start_pfn, end_pfn)
64 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
65 unsigned migratetype);
68 * Test all pages in [start_pfn, end_pfn) are isolated or not.
70 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
71 bool skip_hwpoisoned_pages);
73 struct page *alloc_migrate_target(struct page *page, unsigned long private);