btw, the first step should be to audit all lru_add_drain_all() sites and work out exactly why they are calling lru_add_drain_all() - what are they trying to achive? Because we may be able to use a more lightweight approach there, or handle the asynchronous behaviour in a more graceful fashion, rather than forcing this massive synchronization barrier. -- 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>