What excites me is if you're working down at the high frequency, low latency I/O domain... linux traditionally has actually sort of sucked.

We're _very_ good at buffering things up and handling large chunks to gain high throughput. We have layers and layers of magic that make us _very_ good at that.

For cases where you have lots of devices throwing small chunks at high frequency and you have to respond (in this one, do a small computation, and out that one...) we've sucked bad.

That's why bare metal RTOS's still exist.

The io_uring / eBPF combo looks _very_ promising for opening up that domain in a tidy fashion.

I also hope there will be no reason to throw away "heaps and mounds of existing and perfectly working code and solutions".

I hope to replace my finely tuned epoll / read/write reactor pattern inner loop with io_uring / eBPF and leave 99% of the code untouched... just better throughput / lower latencies.