[deliverable/linux.git] / include / linux / page-isolation.h

#ifndef __LINUX_PAGEISOLATION_H
#define __LINUX_PAGEISOLATION_H


bool has_unmovable_pages(struct zone *zone, struct page *page, int count);
void set_pageblock_migratetype(struct page *page, int migratetype);
int move_freepages_block(struct zone *zone, struct page *page,
				int migratetype);
int move_freepages(struct zone *zone,
			  struct page *start_page, struct page *end_page,
			  int migratetype);

/*
 * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
 * If specified range includes migrate types other than MOVABLE or CMA,
 * 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.
 */
int
start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
			 unsigned migratetype);

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

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

/*
 * Internal functions. Changes pageblock's migrate type.
 */
int set_migratetype_isolate(struct page *page);
void unset_migratetype_isolate(struct page *page, unsigned migratetype);
struct page *alloc_migrate_target(struct page *page, unsigned long private,
				int **resultp);

#endif
Commit	Line	Data
a5d76b54 KH	1	#ifndef __LINUX_PAGEISOLATION_H
	2	#define __LINUX_PAGEISOLATION_H
	3
ee6f509c MK	4
	5	bool has_unmovable_pages(struct zone zone, struct page page, int count);
	6	void set_pageblock_migratetype(struct page *page, int migratetype);
	7	int move_freepages_block(struct zone zone, struct page page,
	8	int migratetype);
435b405c MK	9	int move_freepages(struct zone *zone,
	10	struct page start_page, struct page end_page,
	11	int migratetype);
	12
a5d76b54 KH	13	/*
a5d76b54 KH	14	* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
0815f3d8	15	* If specified range includes migrate types other than MOVABLE or CMA,
a5d76b54 KH	16	* this will fail with -EBUSY.
	17	*
	18	* For isolating all pages in the range finally, the caller have to
	19	* free all pages in the range. test_page_isolated() can be used for
	20	* test it.
	21	*/
ee6f509c	22	int
0815f3d8 MN	23	start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	24	unsigned migratetype);
a5d76b54 KH	25
	26	/*
	27	* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
	28	* target range is [start_pfn, end_pfn)
	29	*/
ee6f509c	30	int
0815f3d8 MN	31	undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	32	unsigned migratetype);
a5d76b54 KH	33
a5d76b54 KH	34	/*
0815f3d8	35	* Test all pages in [start_pfn, end_pfn) are isolated or not.
a5d76b54	36	*/
0815f3d8	37	int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
a5d76b54 KH	38
a5d76b54 KH	39	/*
0815f3d8	40	* Internal functions. Changes pageblock's migrate type.
a5d76b54	41	*/
ee6f509c MK	42	int set_migratetype_isolate(struct page *page);
ee6f509c MK	43	void unset_migratetype_isolate(struct page *page, unsigned migratetype);
723a0644 MK	44	struct page alloc_migrate_target(struct page page, unsigned long private,
723a0644 MK	45	int **resultp);
a5d76b54 KH	46
a5d76b54 KH	47	#endif