On 03/23/2019 06:14 PM, Lawrence Brakmo wrote:

There was no eBPF at that time. We like the flexibility we get by programing
the algorithms in eBPF.

eBPF being there does not mean we can adopt whatever research work,
we want evaluations of the costs and benefits.

These are not intrusive changes, they simply extend the current limited return
values form cgroup skb egress BPF programs to be more in line with qdiscs.

They are quite intrusive changes to IP layer, we can not deny this.