the oai priority field is used to provide the linux scheduling mode, priority and nice value in a single field. Priority value is mapped to linux scheduling mode, priority and nice as listed below: -101 to -199: real time, Round-Robin 1 to 99 -1 to -99 : real time, fifo 1 to 99 0 to 39 : time sharing, nice value -20 to 19 40 to 79 : batch, nice value -20 to 19 >80 : idle