Re: [RFC] writeback and cgroup

From: Tejun Heo
Date: Fri Apr 20 2012 - 17:33:07 EST

On Fri, Apr 20, 2012 at 03:29:30PM -0400, Vivek Goyal wrote:
> I am personally is not too excited about the case of putting async IO
> in separate groups due to the reason that async IO of one group will
> start impacting latencies of sync IO of another group and in practice
> it might not be desirable. But there are others who have use cases for
> separate async IO queue. So as long as switch is there to change the
> behavior, I am not too worried.

Why not just fix cfq so that it prefers groups w/ sync IOs?

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