On Wed, Jul 28, 2021 at 12:41 AM Andrew Lunn <andrew@xxxxxxx> wrote: > > > I also expect some discussion about this feature. Mapping device specific > > TX/RX queues to user space is not done in mainline Linux so far. > > That is probably not quite true. I expect GPUs do it, or at least > something very similar. > > > I will follow your suggestion and drop tsnep_stream.c for the moment. > > Any early comments about this feature are welcome, because the direct > > use of additional TX/RX queues for real-time communication is the main > > feature of this device. > > I know enough to know i don't know enough about cache management from > user space to be able to make any sensible recommendations. > > You probably want to start a discussion with the XDP people and get > them to agree XDP does not work for your use case. Also, the people > who implemented zero-copy, MSG_ZEROCOPY and make sure that is also > unsuitable. Then see if you can reuse some GPU code which has been > well reviewed and tested. You will get less pushback that way, > compared to your own code which will need a good review by somebody > who understands all the issues. I will try to follow your suggestions. Thanks! Gerhard
