LXR linux/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 */
  13extern int
  14start_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 */
  20extern int
  21undo_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 */
  26extern int
  27test_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 */
  33extern int set_migratetype_isolate(struct page *page);
  34extern void unset_migratetype_isolate(struct page *page);
  35
  36
  37#endif
  38