Re: [PATCH block/for-5.2-fixes] bfq: use io.weight interface file instead of io.bfq.weight

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> Il giorno 14 giu 2019, alle ore 23:05, Paolo Valente <paolo.valente@xxxxxxxxxx> ha scritto:
> 
> 
> 
>> Il giorno 14 giu 2019, alle ore 22:22, Tejun Heo <tj@xxxxxxxxxx> ha scritto:
>> 
>> Hello,
>> 
>> On Thu, Jun 13, 2019 at 08:10:38AM +0200, Paolo Valente wrote:
>>> BFQ does not implement weight_device, but we are not talking about
>>> weight_device here.  More precisely, *nothing* implements weight_device
>>> any longer in cgroups-v1, so the documentation is wrong altogether.
>> 
>> I can't see how renaming an interface file which has different
>> behaviors on the same input to the same name is something acceptable.
>> Imagine how confusing that'd be to userspace.  If you want to rename
>> the control knob to io.weight, please implement full semantics for
>> both cgroup1 and cgroup2.
>> 
> 
> I want to, and I've tried to make it easier for you to point me to
> what is missing exactly.  Once again, the only missing piece I see are
> per-device weights.
> 
>> I just posted a separate io.weight implementation for cgroup2 but it's
>> easy to provide a way to override the interface files when bfq gets
>> selected, so let me know when you have a working implementation of the
>> interface.
>> 
> 
> Ok, thanks.  I'll ping you when also per-device weights are available
> in BFQ's interface.
> 

Hi Tejun,
have you seen the patch introducing per-device weights [1]?

[1] https://lkml.org/lkml/2019/8/5/83

Thanks,
Paolo

> Thanks,
> Paolo
> 
>> Thanks.
>> 
>> -- 
>> tejun
> 





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