[linux-2.6-block.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);
/*
 * 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);


#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);
a5d76b54 KH	9	/*
a5d76b54 KH	10	* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
0815f3d8	11	* If specified range includes migrate types other than MOVABLE or CMA,
a5d76b54 KH	12	* this will fail with -EBUSY.
	13	*
	14	* For isolating all pages in the range finally, the caller have to
	15	* free all pages in the range. test_page_isolated() can be used for
	16	* test it.
	17	*/
ee6f509c	18	int
0815f3d8 MN	19	start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	20	unsigned migratetype);
a5d76b54 KH	21
	22	/*
	23	* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
	24	* target range is [start_pfn, end_pfn)
	25	*/
ee6f509c	26	int
0815f3d8 MN	27	undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	28	unsigned migratetype);
a5d76b54 KH	29
a5d76b54 KH	30	/*
0815f3d8	31	* Test all pages in [start_pfn, end_pfn) are isolated or not.
a5d76b54	32	*/
0815f3d8	33	int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
a5d76b54 KH	34
a5d76b54 KH	35	/*
0815f3d8	36	* Internal functions. Changes pageblock's migrate type.
a5d76b54	37	*/
ee6f509c MK	38	int set_migratetype_isolate(struct page *page);
ee6f509c MK	39	void unset_migratetype_isolate(struct page *page, unsigned migratetype);
a5d76b54 KH	40
	41
	42	#endif