summaryrefslogtreecommitdiffstats
path: root/include/linux/page-isolation.h
blob: 051c1b1ede4e668651f5310a88771115087dcdc9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
#ifndef __LINUX_PAGEISOLATION_H
#define __LINUX_PAGEISOLATION_H

/*
 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
 * If specified range includes migrate types other than MOVABLE,
 * this will fail with -EBUSY.
 *
 * For isolating all pages in the range finally, the caller have to
 * free all pages in the range. test_page_isolated() can be used for
 * test it.
 */
extern int
start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);

/*
 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
 * target range is [start_pfn, end_pfn)
 */
extern int
undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);

/*
 * test all pages in [start_pfn, end_pfn)are isolated or not.
 */
extern int
test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);

/*
 * Internal funcs.Changes pageblock's migrate type.
 * Please use make_pagetype_isolated()/make_pagetype_movable().
 */
extern int set_migratetype_isolate(struct page *page);
extern void unset_migratetype_isolate(struct page *page);


#endif
OpenPOWER on IntegriCloud