[net-next-2.6.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,
 * 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);

/*
 * 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);

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

/*
 * Internal funcs.Changes pageblock's migrate type.
 * Please use make_pagetype_isolated()/make_pagetype_movable().
 */
extern int set_migratetype_isolate(struct page *page);
extern void unset_migratetype_isolate(struct page *page);


#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.
	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	*/
	13	extern int
	14	start_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	*/
	20	extern int
	21	undo_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	*/
	26	extern int
	27	test_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	*/
	33	extern int set_migratetype_isolate(struct page *page);
	34	extern void unset_migratetype_isolate(struct page *page);
	35
	36
	37	#endif