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