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    SubjectRe: [BUG]Writeback Cgroup/Dirty Throttle: very small buffered write thoughput caused by writeback cgroup and dirty thottle
    Hello,

    Sorry about the delay. I forgot about this thread.

    On Fri, May 13, 2016 at 02:11:53PM +0800, Miao Xie wrote:
    > Better than the kernel without patch. Now the benchmark could reach
    > the device bandwidth after 5-8 seconds. But at the beginning, it
    > was still very slow, and its thoughput was only 4MB/s for ~4
    > seconds, then it could go up in 1~3 seconds.

    I see. As this fix is needed anyways, I'll send it up. As for the
    ramp-up, it could be normal. There are estimators which take running
    avg and modulate the threshold accordingly and the starting values are
    conservative, so a short ramp-up time can be coming from that.

    Thanks.

    --
    tejun

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