On Wed, Jul 04, 2012 at 03:26:17PM +0800, Lai Jiangshan wrote: > MIGRATE_HOTREMOVE is a special kind of MIGRATE_MOVABLE, but it is stable: > any page of the type can NOT be changed to the other type nor be moved to > the other free list. > > So the pages of MIGRATE_HOTREMOVE are always movable, this ability is > useful for hugepages and hotremove ...etc. > > MIGRATE_HOTREMOVE pages is the used as the first candidate when > we allocate movable pages. > > 1) add small routine is_migrate_movable() for movable-like types > 2) add small routine is_migrate_stable() for stable types > 3) fix some comments > 4) fix get_any_page(). The get_any_page() may change > MIGRATE_CMA/HOTREMOVE types page to MOVABLE which may cause this page > to be changed to UNMOVABLE. > Reuse MIGRATE_CMA. Even if the pages are on the movable lists it should not be a problem for memory hot-remove. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>