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KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -07001#ifndef __LINUX_PAGEISOLATION_H
2#define __LINUX_PAGEISOLATION_H
3
Minchan Kim194159f2013-02-22 16:33:58 -08004#ifdef CONFIG_MEMORY_ISOLATION
Joonsoo Kimad53f922014-11-13 15:19:11 -08005static inline bool has_isolate_pageblock(struct zone *zone)
6{
7 return zone->nr_isolate_pageblock;
8}
Minchan Kim194159f2013-02-22 16:33:58 -08009static 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
Joonsoo Kimad53f922014-11-13 15:19:11 -080018static inline bool has_isolate_pageblock(struct zone *zone)
19{
20 return false;
21}
Minchan Kim194159f2013-02-22 16:33:58 -080022static 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
Minchan Kimee6f5092012-07-31 16:43:50 -070031
Wen Congyangb023f462012-12-11 16:00:45 -080032bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
33 bool skip_hwpoisoned_pages);
Minchan Kimee6f5092012-07-31 16:43:50 -070034void set_pageblock_migratetype(struct page *page, int migratetype);
35int move_freepages_block(struct zone *zone, struct page *page,
36 int migratetype);
Minchan Kim435b4052012-10-08 16:32:16 -070037int move_freepages(struct zone *zone,
38 struct page *start_page, struct page *end_page,
39 int migratetype);
40
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070041/*
42 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
Michal Nazarewicz0815f3d2012-04-03 15:06:15 +020043 * If specified range includes migrate types other than MOVABLE or CMA,
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070044 * this will fail with -EBUSY.
45 *
46 * For isolating all pages in the range finally, the caller have to
47 * free all pages in the range. test_page_isolated() can be used for
48 * test it.
49 */
Minchan Kimee6f5092012-07-31 16:43:50 -070050int
Michal Nazarewicz0815f3d2012-04-03 15:06:15 +020051start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
Wen Congyangb023f462012-12-11 16:00:45 -080052 unsigned migratetype, bool skip_hwpoisoned_pages);
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070053
54/*
55 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
56 * target range is [start_pfn, end_pfn)
57 */
Minchan Kimee6f5092012-07-31 16:43:50 -070058int
Michal Nazarewicz0815f3d2012-04-03 15:06:15 +020059undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
60 unsigned migratetype);
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070061
62/*
Michal Nazarewicz0815f3d2012-04-03 15:06:15 +020063 * Test all pages in [start_pfn, end_pfn) are isolated or not.
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070064 */
Wen Congyangb023f462012-12-11 16:00:45 -080065int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
66 bool skip_hwpoisoned_pages);
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070067
68/*
Michal Nazarewicz0815f3d2012-04-03 15:06:15 +020069 * Internal functions. Changes pageblock's migrate type.
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070070 */
Wen Congyangb023f462012-12-11 16:00:45 -080071int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages);
Minchan Kimee6f5092012-07-31 16:43:50 -070072void unset_migratetype_isolate(struct page *page, unsigned migratetype);
Minchan Kim723a0642012-10-08 16:32:52 -070073struct page *alloc_migrate_target(struct page *page, unsigned long private,
74 int **resultp);
KAMEZAWA Hiroyukia5d76b52007-10-16 01:26:11 -070075
76#endif