include/linux/page-isolation.h

   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 or CMA,
   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                          unsigned migratetype);
  16
  17 /*
  18  * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
  19  * target range is [start_pfn, end_pfn)
  20  */
  21 extern int
  22 undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  23                         unsigned migratetype);
  24
  25 /*
  26  * Test all pages in [start_pfn, end_pfn) are isolated or not.
  27  */
  28 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
  29
  30 /*
  31  * Internal functions. Changes pageblock's migrate type.
  32  */
  33 extern int set_migratetype_isolate(struct page *page);
  34 extern void unset_migratetype_isolate(struct page *page, unsigned migratetype);
  35
  36
  37 #endif