“Even with io_uring though, afaik there’s inevitably a memcpy to create the sk_buf to hand off to the network driver no? I’m more fuzzy on how that stuff works

“Even with io_uring though, afaik there’s inevitably a memcpy to create the sk_buf to hand off to the network driver no? I’m more fuzzy on how that stuff works but I don’t think the sk_buf is implemented as a list of iovecs.” Having worked with sk_bufs a bit I hope a copy isn’t needed for a network send. All the tooling I worked with around those was zero copy.