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,
   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