1*4882a593SmuzhiyunWhat: /sys/block/<device>/iosched/target_latency 2*4882a593SmuzhiyunDate: March 2012 3*4882a593Smuzhiyuncontact: Tao Ma <boyu.mt@taobao.com> 4*4882a593SmuzhiyunDescription: 5*4882a593Smuzhiyun The /sys/block/<device>/iosched/target_latency only exists 6*4882a593Smuzhiyun when the user sets cfq to /sys/block/<device>/scheduler. 7*4882a593Smuzhiyun It contains an estimated latency time for the cfq. cfq will 8*4882a593Smuzhiyun use it to calculate the time slice used for every task. 9