Paolo Bonzini noticed something a little awkward in the Linux kernel support code for Microsoft's HyperV virtualisation environment - specifically, that the magic constant passed through to the hypervisor was "0xB16B00B5", or, in English, "BIG BOOBS". It turns out that this isn't an exception - when the code was originally submitted it also contained "0x0B00B135" . That one got removed when the Xen support code was ripped out.At the most basic level it's just straightforward childish humour, and the use of vaguely-English strings in magic hex constants is hardly uncommon. But it's also specifically male childish humour. Puerile sniggering at breasts contributes to the continuing impression that software development is a boys club where girls aren't welcome . It's especially irritating in this case because Azure may depend on this constant , so changing it will break things.So, full marks, Microsoft. You've managed to make the kernel more offensive to half the population and you've made it awkward for us to rectify it.