Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __LINUX_PAGEISOLATION_H
3#define __LINUX_PAGEISOLATION_H
4
5#ifdef CONFIG_MEMORY_ISOLATION
6static inline bool has_isolate_pageblock(struct zone *zone)
7{
8 return zone->nr_isolate_pageblock;
9}
10static inline bool is_migrate_isolate_page(struct page *page)
11{
12 return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
13}
14static inline bool is_migrate_isolate(int migratetype)
15{
16 return migratetype == MIGRATE_ISOLATE;
17}
18#else
19static inline bool has_isolate_pageblock(struct zone *zone)
20{
21 return false;
22}
23static inline bool is_migrate_isolate_page(struct page *page)
24{
25 return false;
26}
27static inline bool is_migrate_isolate(int migratetype)
28{
29 return false;
30}
31#endif
32
33#define SKIP_HWPOISON 0x1
34#define REPORT_FAILURE 0x2
35
36bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
37 int migratetype, int flags);
38void set_pageblock_migratetype(struct page *page, int migratetype);
39int move_freepages_block(struct zone *zone, struct page *page,
40 int migratetype, int *num_movable);
41
42/*
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.
46 *
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
49 * test it.
50 *
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
54 */
55int
56start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
57 unsigned migratetype, int flags);
58
59/*
60 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
61 * target range is [start_pfn, end_pfn)
62 */
63int
64undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
65 unsigned migratetype);
66
67/*
68 * Test all pages in [start_pfn, end_pfn) are isolated or not.
69 */
70int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
71 bool skip_hwpoisoned_pages);
72
73struct page *alloc_migrate_target(struct page *page, unsigned long private);
74
75#endif