1*407ac95eSTao MaWhat: /sys/block/<device>/iosched/target_latency 2*407ac95eSTao MaDate: March 2012 3*407ac95eSTao Macontact: Tao Ma <boyu.mt@taobao.com> 4*407ac95eSTao MaDescription: 5*407ac95eSTao Ma The /sys/block/<device>/iosched/target_latency only exists 6*407ac95eSTao Ma when the user sets cfq to /sys/block/<device>/scheduler. 7*407ac95eSTao Ma It contains an estimated latency time for the cfq. cfq will 8*407ac95eSTao Ma use it to calculate the time slice used for every task. 9