Im currently using latest v7.1beta6 build, got CAKE QoS working without kernel panic with some tuning.
But there's something odd. As an example, if we create simple queue with CAKE as queue type it wil automatically preserve approx 2M of RAM with no traffic running on that queue.
However, i managed to get rid bufferbloat with CAKE QoS without single mangle or priority stuff which is very nice!
Sure would be happy if i get *early test dev build & give some feedback, since im using x86 then it should be safe enough.