Hi Neil,

have you already had the time to look at these patches?

We have this in production with cfq scheduler already on two storage
servers and customers noticed a huge performance boost. Also our
monitoring shows higher and smoother iop numbers.

Cheers,
Sebastian


On 04.06.2014 19:09, Sebastian Parschauer wrote:

Patches apply to linux v3.15-rc8 and mdadm master commit 8a3544f895.

Florian-Ewald Mueller (3):
      md: complete bio accounting and add io_latency extension
      md: introduce request function mode support
      md: handle IO latency accounting in rqfn mode

Sebastian Parschauer (1):
      mdadm: introduce '--use-requestfn' create/assembly option