Re: unify the interface of the proportional-share policy in blkio/io

[Jens Axboe]

On 1/9/18 12:52 PM, Tejun Heo wrote:
> Hello, Paolo.
> 
> On Thu, Jan 04, 2018 at 08:00:02PM +0100, Paolo Valente wrote:
>> The solution for the second type of parameters may prove useful to
>> unify also the computation of statistics for the throttling policy.
>>
>> Does this proposal sound reasonable?
> 
> So, the above should work too but I wonder whether we could do this
> simpler.  Frankly, I wouldn't mind if cfq and bfq can't be mixed on a
> system - e.g. they can be built together but you can't enable bfq on
> some devides and cfq on others.  If we do that, all we need to do is
> just removing / adding cftypes when either gets activated which cgroup
> already does.

Not sure that would fly, since cfq is legacy and bfq is mq. You don't
always have a free choice of which one to use...

-- 
Jens Axboe