kernel/Documentation/ABI/testing/sysfs-cfq-target-latency

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