It's not like I have a dog in this race, I'm just another consumer of these kernel interfaces...
But I am happy something finally has landed upstream we can start writing generic userspace programs targeting and actually expect them to work on distro kernels in the future. But we probably still need a compatibility layer for emulating it in userspace, looks feasible.
Ah. "Contributions are welcome" made me think of you as one of the welcomers.
Compatibility-layer-wise, I did actually do that for my batch system. In the tiny user-space entry point I check if sys_batch is working and if not I fall back to just a loop of userspace making syscalls. That also checks a BATCH_EMUL environment variable to force that emulation mode for benchmarking purposes { so I don't have to unload/reload the module. :-) }
So, user code would always just work, but work faster on kernels with the module loaded.
I've just been following the io_uring mailing list as of late. It appears to be a welcoming environment to outside contribution, assuming quality and relevance of course.
It's not like I have a dog in this race, I'm just another consumer of these kernel interfaces...
But I am happy something finally has landed upstream we can start writing generic userspace programs targeting and actually expect them to work on distro kernels in the future. But we probably still need a compatibility layer for emulating it in userspace, looks feasible.