Hello,

On Mon, Jul 27, 2015 at 12:12:09PM -0400, Vivek Goyal wrote:

I browsed though the details of above knobs and it sounds great. It is
clean and much less number of knobs and files. You got rid of all the
debug CFQ knobs which is good. I was not happy with these either. Glad

Yeah, especially given that CFQ may be replaced by BFQ.

to see that all the magic about leaf weight is gone. That was really
mind bending. Knob for reset stats is gone and instead of mutiple files
for configuration now we are using single file for R/W BPS/IOPS
configuration.

I will do some basic testing and see if something pops up.

Userspace will need to understand these new files but that's the
understanding anyway that unified hierarchy is different and needs
to be handled differently.

For blkcg (and memory too), the usage model changes so drastically
that I don't think blkcg interface changes would matter much.
Everything is changed anyway.

Thanks.

-- 
tejun