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 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. Thanks. -- tejun