[PATCH V2 2/2] Documentation: Add sysfs ABI change for cfq's target latency.

From: Tao Ma
Date: Sat Mar 31 2012 - 11:31:25 EST

From: Tao Ma <boyu.mt@xxxxxxxxxx>

Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Tao Ma <boyu.mt@xxxxxxxxxx>
Documentation/ABI/testing/sysfs-cfq-target-latency | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-cfq-target-latency

diff --git a/Documentation/ABI/testing/sysfs-cfq-target-latency b/Documentation/ABI/testing/sysfs-cfq-target-latency
new file mode 100644
index 0000000..df0f782
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-cfq-target-latency
@@ -0,0 +1,8 @@
+What: /sys/block/<device>/iosched/target_latency
+Date: March 2012
+contact: Tao Ma <boyu.mt@xxxxxxxxxx>
+ 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.

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