KERNEL_CONFIG+="-IRQ_TIME_ACCOUNTING"
use laptop || KERNEL_CONFIG+=" RCU_EXPERT -RCU_FAST_NO_HZ"
# novadays no good? to figure out
#KERNEL_CONFIG+=" SLAB"
use rt2 && KERNEL_CONFIG+=" HZ_1000" || KERNEL_CONFIG+=" -TASKS_RCU HZ_100"
# default is voluntary by mainstream quality
use rt || use rt2 || KERNEL_CONFIG+=" PREEMPT_NONE"