s2k15 Hackathon Report: mpi@ on network stack SMP

Martin Pieuchot (mpi@) writes in with his report from the s2k15 hackathon:

s2k15 was definitely a hackathon to get things started and for me, the's' was clearly for SMP. I arrived a bit earlier to be able to finallymeet and discuss with David (dlg@), our host, in order to define a strategyto continue moving some bits and pieces of the network stack out of the biglock.

And that's what we did. So we had a look at the glue between the networkdrivers and the stack and found a way to improve the integration of pseudodrivers in the Ethernet layer. The goal of this refactoring is to avoidrecursion and decouple code paths in order to make it easier to turn everypseudo driver MP-safe. That's why I rapidly commited a new interfaceand then started to convert various drivers.

As usual I committed some bug fixes and other small cleanups in the neworkstack and I also took advantage of the fact that Miod (miod@) was sittingnext to me, to bother him with some powerpc related questions. We endedup fixing some small bugs for G5 machines. As a result they can now useradeondrm(4) and correctly see all their available memory.

I really enjoyed this shiny week of hacking, thank you very much David forhosting us here and thanks to Theo and the OpenBSD foundation for takingcare of my flight and accomodation!

Thanks to Martin for being the first with his post-hackathon write-up!