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 #define MEMORY_OFFLINE 0x1
34 #define REPORT_FAILURE 0x2
35
36 void set_pageblock_migratetype(struct page *page, int migratetype);
37 int move_freepages_block(struct zone *zone, struct page *page,
38 int migratetype, int *num_movable);
39
40 /*
41 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
42 */
43 int
44 start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
45 int migratetype, int flags, gfp_t gfp_flags);
46
47 /*
48 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
49 * target range is [start_pfn, end_pfn)
50 */
51 void
52 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
53 int migratetype);
54
55 /*
56 * Test all pages in [start_pfn, end_pfn) are isolated or not.
57 */
58 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
59 int isol_flags);
60
61 struct page *alloc_migrate_target(struct page *page, unsigned long private);
62
63 #endif
64