On Wed, 11 Dec 2013, Joonsoo Kim wrote: > In do_move_pages(), if error occurs, 'goto out_pm' is executed and the > page status doesn't back to userspace. So we don't need to store err number. If a page cannot be moved then the error code is containing the number of pages that could not be migrated. The check there is for err < 0. So a positive number is not an error. migrate_pages only returns an error code if we are running out of memory. -- 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>