On Mon, Aug 29, 2022 at 05:21:11PM -0700, Jakub Kicinski wrote: > On Mon, 29 Aug 2022 09:53:17 -0700 Cong Wang wrote: > > > Similarly to Eric's comments on v1 I'm not seeing the clear motivation > > > here. Modern high speed UDP users will have a CC in user space, back > > > off and set transmission time on the packets. Could you describe your > > > _actual_ use case / application in more detail? > > > > Not everyone implements QUIC or CC, it is really hard to implement CC > > from scratch. This backpressure mechnism is much simpler than CC (TCP or > > QUIC), as clearly it does not deal with any remote congestions. > > > > And, although this patchset only implements UDP backpressure, it can be > > applied to any other protocol easily, it is protocol-independent. > > No disagreement on any of your points. But I don't feel like > you answered my question about the details of the use case. Do you need a use case for UDP w/o QUIC? Seriously??? There must be tons of it... Take a look at UDP tunnels, for instance, wireguard which is our use case. ByteDance has wireguard-based VPN solution for bussiness. (I hate to brand ourselves, but you are asking for it...) Please do research on your side, as a netdev maintainer, you are supposed to know this much better than me. Thanks.
