The rapid growth of io_uring

I tried implementing that. What I mean is that, for example, if you were trying to copy 0x8000 byte chunks at a time, and the first SQE splicing from the input file to the pipe only copied 0x4000 bytes, the linked SQE would still try to read 0x8000 bytes from the pipe and potentially get the wrong data. Additionally, I'm not sure there's a guarantee that these linked SQEs would be atomic (i.e. if SQE A was linked to SQE B, and SQE C was linked to SQE D, the order A, C, B, D could be allowed and result in data being written to the wrong offsets in the output).

Thinking about it more, I suppose this could be solved by creating a large number of pipes, and making sure that no two SQEs using the same pipe are in flight at the same time. I'm concerned that having many pipes could result in its own performance issues, but it'd probably be fine...?