| KAMEZAWA Hiroyuki | a5d76b5 | 2007-10-16 01:26:11 -0700 | [diff] [blame] | 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 |