Hello Gavin, On Tue, Jul 17, 2012 at 12:44:14PM +0800, Gavin Shan wrote: > Function __isolate_lru_page() is called by isolate_lru_pages() or > isolate_migratepages_range(). For both cases, the PG_lru flag for In isolate_lru_pages, the check is with VM_BUG_ON so if we disable CONFIG_DEBUG_VM, we still need it. -- Kind regards, Minchan Kim -- 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>