Re: [PATCH V2 00/10] unify the interface of the proportional-share policy in blkio/io

[Tejun Heo]

Hello, Paolo.

On Fri, Nov 30, 2018 at 07:23:24PM +0100, Paolo Valente wrote:
> > Then we understood that exactly the same happens with throttling, in
> > case the latter is activated on different devices w.r.t. bfq.
> > 
> > In addition, the same may happen, in the near future, with the
> > bandwidth controller Josef is working on.  If the controller can be
> > configured per device, as with throttling, then statistics may differ,
> > for the same interface files, between bfq, throttling and that
> > controller.

So, regardless of how all these are implemented, what's presented to
user should be consistent and clear.  There's no other way around it.
Only what's relevant should be visible to userspace.

> have you had time to look into this?  Any improvement to this
> interface is ok for us. We are only interested in finally solving this
> interface issue, as, for what concerns us directly, it has been
> preventing legacy code to use bfq for years.

Unfortunately, I don't have any implementation proposal, but we can't
show things this way to userspace.

Thanks.

-- 
tejun