On Thu, Aug 27, 2015 at 3:42 PM, David Miller [off-list ref] wrote:

Long term it's the wrong fix, trust me.

So we have plan to convert some non-defaultable qdisc to defaultable?
I don't see a reason here.

If you fix it properly, by making every qdisc capable of being ->init()'d
without explicit parameters, it will be the best behavior overall.

The problem is ->init() is not even called when setting it as default,
since setting a default qdisc doesn't need to create a qdisc. This is
why the flag has to be in ops->flags rather than qdisc->flags.