I don't think that kind of optim is usually important in a kernel, especially one architected a lot with dynamical modules. Plus, on the convenience side, you c

I don't think that kind of optim is usually important in a kernel, especially one architected a lot with dynamical modules. Plus, on the convenience side, you can also use other models (e.g. have some function pointers at instance level) than the one of C++ in ways that do not look like completely different when reading the source. Devirtualization is mainly useful to cope with some C++ self inflicted wounds. Linux obviously never had them the first place.