[mirror_ubuntu-bionic-kernel.git] / include / linux / page-isolation.h

#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 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.
 */
extern 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)
 */
extern 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.
 */
extern int set_migratetype_isolate(struct page *page);
extern 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
	4	/*
	5	* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
0815f3d8	6	* If specified range includes migrate types other than MOVABLE or CMA,
a5d76b54 KH	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	*/
	13	extern int
0815f3d8 MN	14	start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	15	unsigned migratetype);
a5d76b54 KH	16
	17	/*
	18	* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
	19	* target range is [start_pfn, end_pfn)
	20	*/
	21	extern int
0815f3d8 MN	22	undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
0815f3d8 MN	23	unsigned migratetype);
a5d76b54 KH	24
a5d76b54 KH	25	/*
0815f3d8	26	* Test all pages in [start_pfn, end_pfn) are isolated or not.
a5d76b54	27	*/
0815f3d8	28	int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
a5d76b54 KH	29
a5d76b54 KH	30	/*
0815f3d8	31	* Internal functions. Changes pageblock's migrate type.
a5d76b54 KH	32	*/
a5d76b54 KH	33	extern int set_migratetype_isolate(struct page *page);
0815f3d8	34	extern void unset_migratetype_isolate(struct page *page, unsigned migratetype);
a5d76b54 KH	35
	36
	37	#endif