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