1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_PAGEISOLATION_H
3 #define __LINUX_PAGEISOLATION_H
4
5 #ifdef CONFIG_MEMORY_ISOLATION
has_isolate_pageblock(struct zone * zone)6 static inline bool has_isolate_pageblock(struct zone *zone)
7 {
8 return zone->nr_isolate_pageblock;
9 }
is_migrate_isolate_page(struct page * page)10 static inline bool is_migrate_isolate_page(struct page *page)
11 {
12 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
13 }
is_migrate_isolate(int migratetype)14 static inline bool is_migrate_isolate(int migratetype)
15 {
16 return migratetype == MIGRATE_ISOLATE;
17 }
18 #else
has_isolate_pageblock(struct zone * zone)19 static inline bool has_isolate_pageblock(struct zone *zone)
20 {
21 return false;
22 }
is_migrate_isolate_page(struct page * page)23 static inline bool is_migrate_isolate_page(struct page *page)
24 {
25 return false;
26 }
is_migrate_isolate(int migratetype)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
68 #endif
69