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KAMEZAWA Hiroyukia5d76b542007-10-16 01:26:11 -07001#ifndef __LINUX_PAGEISOLATION_H
2#define __LINUX_PAGEISOLATION_H
3
4/*
5 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
6 * If specified range includes migrate types other than MOVABLE,
7 * this will fail with -EBUSY.
8 *
9 * For isolating all pages in the range finally, the caller have to
10 * free all pages in the range. test_page_isolated() can be used for
11 * test it.
12 */
13extern int
14start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
15
16/*
17 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
18 * target range is [start_pfn, end_pfn)
19 */
20extern int
21undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
22
23/*
24 * test all pages in [start_pfn, end_pfn)are isolated or not.
25 */
26extern int
27test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
28
29/*
30 * Internal funcs.Changes pageblock's migrate type.
31 * Please use make_pagetype_isolated()/make_pagetype_movable().
32 */
33extern int set_migratetype_isolate(struct page *page);
34extern void unset_migratetype_isolate(struct page *page);
35
36
37#endif