On Mon, 19 Aug 2013, Ming Lei wrote: > Another disadvantage is that accessing the shared variable is still > slower than accessing one percpu variable in theory. By that argument, _everything_ in the kernel should be percpu. There is a reason why atomic variables exist. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html