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Documentation: Add sysfs ABI change for cfq's target latency. 

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Tao Ma 2012-04-01 14:33:40 -07:00 committed by Jens Axboe
parent 5bf14c0727
commit 407ac95e22
1 changed files with 8 additions and 0 deletions
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Documentation/ABI/testing/sysfs-cfq-target-latency Normal file
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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.