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    Subject[PATCH V2 2/2] Documentation: Add sysfs ABI change for cfq's target latency.
    Date
    From: Tao Ma <boyu.mt@taobao.com>

    Cc: Jens Axboe <axboe@kernel.dk>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Tao Ma <boyu.mt@taobao.com>
    ---
    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@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.
    --
    1.7.0.4


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