Clarification, sqm is not broken with sfe, but both are functionally mutually exclusive; I believe @dissent1's patch will disable sfe if there is an active sqm instance on an interface, while @gwlim's patch set will give priority to sfe and effectively disable sqm (or rather sqm will only see those ~128 packets the are needed to trigger the fast pathing). I do not believe this will change any time soon.