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