I see that github have recently announced their pricing plans. Looks like they’ll not be having many kernel developers using their “open source” plan – my current working Linux .git is 261Mb but you start having to pay at 100Mb. git may be very space efficient but the kernel is an enormous project. Mind you, the whole web service based approach of github is fairly alien to kernel development – a large part of what it’s doing is replacing the combination of mailing lists together with git send-email and git am (or their equivalents) that the kernel relies on for code exchange and review. Interestingly it appears not to have done anything that provides the discussion and review side of things – that seems like a surprising omission for a web 2.0ish thing.