Comment 25 for bug 1720126

@nacc

Thanks so much for the explanation. I also found https://wiki.ubuntu.com/ServerTeam/KnowledgeBase#Merge_Proposals_and_Reviewing that details a bit more of the internal processes. As relative outsiders to the Ubuntu process, I'd appreciate it very much if you could handle that part for Monique's patches. I can be on hand to answer technical questions if required.

Regarding the buffer size choice, it's very arbitrary as Phil said. I'm pretty sure we came to the same conclusion independently (libvirt and libnl had very similar issues) and the workaround is obvious. 32k seems to work for 64 VF's (our test case), but breaks with 128 VF's. Not a lot of machines can handle 128 concurrent VF's. I typed 64k "just because". libvirt+libnl allow message peeking. However, iproute2 uses netlink directly. So, implementing a similar idea would require an entirely new receive codepath with all the fun of finding out where new exception paths occur: something to be done on tip and not suitable for backport without thorough vetting.

I'm sure it'll save a lot of time once the kinks have been worked out of the automation, backports are quite the double-edged sword.