Messages in this thread | | | Date | Tue, 11 Dec 2012 06:27:42 -0800 | From | Tejun Heo <> | Subject | Re: performance drop after using blkcg |
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On Tue, Dec 11, 2012 at 09:25:18AM -0500, Vivek Goyal wrote: > In general, do not use blkcg on faster storage. In current form it > is at best suitable for single rotational SATA/SAS disk. I have not > been able to figure out how to provide fairness without group idling.
I think cfq is just the wrong approach for faster non-rotational devices. We should be allocating iops instead of time slices.
Thanks.
-- tejun
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