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| author |   Tao Ma <boyu.mt@taobao.com> | 2012-04-01 14:33:40 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2012-04-01 14:33:40 -0700 |
| commit | 407ac95e2271a310016ced97f407676e79c53c06 (patch) | |
| tree | f644750773554011a3cc7cbeebf5f14adf0a79ce /Documentation/ABI | |
| parent | block: Make cfq_target_latency tunable through sysfs. (diff) | |
| download | linux-dev-407ac95e2271a310016ced97f407676e79c53c06.tar.xz linux-dev-407ac95e2271a310016ced97f407676e79c53c06.zip | |
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>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-cfq-target-latency | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-cfq-target-latency b/Documentation/ABI/testing/sysfs-cfq-target-latency new file mode 100644 index 000000000000..df0f7828c5e3 --- /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. |