Comment by namibj
1 day ago
The problem is that the ring requires suitably locked memory which won't be subject to swapping, thus inherently forcing a different memory type if you want the extra-low-overhead/extra-scalable operation.
It makes sense to ask the ring wrapper for memory that you can emplace your payload into before submitting the IO if you want to use zero-copy.
newpavlov seems to operate in a theoretical bubble. Until something like he describes is published publicly where we talk more concretely, it's not worth engaging. Requiring special buffers is very typical for any hardware offload with zero copy. It isn't a leaky abstraction. Async rust is well designed and I've not seen anything rival it. If there are problems it's in the libraries built on top like tokio.