[linux-2.6-block.git] / include / linux / page-isolation.h

#ifndef __LINUX_PAGEISOLATION_H
#define __LINUX_PAGEISOLATION_H

#ifdef CONFIG_MEMORY_ISOLATION
static inline bool has_isolate_pageblock(struct zone *zone)
{
	return zone->nr_isolate_pageblock;
}
static inline bool is_migrate_isolate_page(struct page *page)
{
	return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
}
static inline bool is_migrate_isolate(int migratetype)
{
	return migratetype == MIGRATE_ISOLATE;
}
#else
static inline bool has_isolate_pageblock(struct zone *zone)
{
	return false;
}
static inline bool is_migrate_isolate_page(struct page *page)
{
	return false;
}
static inline bool is_migrate_isolate(int migratetype)
{
	return false;
}
#endif

bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
			 bool skip_hwpoisoned_pages);
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, bool skip_hwpoisoned_pages);

/*
 * 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,
			bool skip_hwpoisoned_pages);

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
194159fb	4	#ifdef CONFIG_MEMORY_ISOLATION
ad53f92e JK	5	static inline bool has_isolate_pageblock(struct zone *zone)
	6	{
	7	return zone->nr_isolate_pageblock;
	8	}
194159fb MK	9	static inline bool is_migrate_isolate_page(struct page *page)
	10	{
	11	return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
	12	}
	13	static inline bool is_migrate_isolate(int migratetype)
	14	{
	15	return migratetype == MIGRATE_ISOLATE;
	16	}
	17	#else
ad53f92e JK	18	static inline bool has_isolate_pageblock(struct zone *zone)
	19	{
	20	return false;
	21	}
194159fb MK	22	static inline bool is_migrate_isolate_page(struct page *page)
	23	{
	24	return false;
	25	}
	26	static inline bool is_migrate_isolate(int migratetype)
	27	{
	28	return false;
	29	}
	30	#endif
ee6f509c	31
b023f468 WC	32	bool has_unmovable_pages(struct zone zone, struct page page, int count,
b023f468 WC	33	bool skip_hwpoisoned_pages);
ee6f509c MK	34	void set_pageblock_migratetype(struct page *page, int migratetype);
	35	int move_freepages_block(struct zone zone, struct page page,
	36	int migratetype);
435b405c MK	37	int move_freepages(struct zone *zone,
	38	struct page start_page, struct page end_page,
	39	int migratetype);
	40
a5d76b54 KH	41	/*
a5d76b54 KH	42	* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
0815f3d8	43	* If specified range includes migrate types other than MOVABLE or CMA,
a5d76b54 KH	44	* 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	*/
ee6f509c	50	int
0815f3d8	51	start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
b023f468	52	unsigned migratetype, bool skip_hwpoisoned_pages);
a5d76b54 KH	53
	54	/*
	55	* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
	56	* target range is [start_pfn, end_pfn)
	57	*/
ee6f509c	58	int
0815f3d8 MN	59	undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	60	unsigned migratetype);
a5d76b54 KH	61
a5d76b54 KH	62	/*
0815f3d8	63	* Test all pages in [start_pfn, end_pfn) are isolated or not.
a5d76b54	64	*/
b023f468 WC	65	int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
b023f468 WC	66	bool skip_hwpoisoned_pages);
a5d76b54	67
723a0644 MK	68	struct page alloc_migrate_target(struct page page, unsigned long private,
723a0644 MK	69	int **resultp);
a5d76b54 KH	70
a5d76b54 KH	71	#endif