[benlwalker]

I am very closely tied to what the NVMe vendors want, having written the first internal draft of the proposal to the standards body (since that draft many smart people have taken the pen and done a lot of great work).

XRP is unrelated to offloading eBPF to NVMe devices.

[manifault]

Sure, whatever. "Offloading" was perhaps a poor choice of wording, but it is related to the standardization efforts. The NVMe vendors don't want to be calling out to BPF programs in the driver if the runtime semantics are not standardized.

[benlwalker]

XRP is a regular BPF hook in Linux and requires no additional standardization. The device never "calls out to BPF programs in the driver" - it generates a normal completion interrupt and Linux runs a BPF hook in the completion path. This is no different than other kernel BPF hooks elsewhere and doesn't provide any additional reason or need to standardize BPF.

The article misstated that XRP was a framework used for offloading BPF programs to NVMe devices. That's not correct, and XRP is not one of the emerging use cases for BPF that is driving standardization.

[rektide]

XRP initially looks to be focused on moving work upstream into the kernel not devices.

But absolutely, once you start shipping ebpf into the kernel, people do quickly start asking, "how can we hardware accelerate that?". Having standards would be helpful.