On Mon, 29 Aug 2022 09:53:17 -0700 Cong Wang wrote:

quoted

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.