[jsjohnst]

> I mean how would linux behave when you add/remove cores and RAM f.ex.?

This is already possible on ESXi with Linux guests for years now, so it’s certainly a solved problem in some capacity.

[ti_ranger]

> This is already possible on ESXi with Linux guests for years now, so it’s certainly a solved problem in some capacity.

And has been possible on KVM (e.g. VirtManager, RHV/RHEV/Ovirt) for years too.

Xen 3 also supported online memory increases (but I don't think CPU).