On Fri, Nov 21, 2014 at 12:00 PM, Dave Jones <da...@redhat.com> wrote: > On Fri, Nov 21, 2014 at 11:46:57AM -0800, Linus Torvalds wrote: > > > Anybody who seriously does virtualization uses hw virtualization that > > is much better than it used to be. And the non-serious users aren't > > that performance-sensitive by definition. > > > > I note that the Fedora kernel config seems to include paravirt by > > default, so you get a lot of the crazy overheads.. > > I'm not sure how many people actually use paravirt these days, > but the reason Fedora has it enabled still at least is probably > because.. > > config KVM_GUEST > bool "KVM Guest support (including kvmclock)" > depends on PARAVIRT > > But tbh I've not looked at this stuff since it first got merged. > Will a full-virt system kvm boot a guest without KVM_GUEST enabled ? > (ie, is this just an optimisation for the paravirt case?) >
It will boot just fine, although there may be some timing glitches. I think we should have PARAVIRT_LITE that's just enough for KVM. That probably involves some apic changes and nothing else. --Andy > I'm not a heavy virt user, so I don't even remember how a lot of > this stuff is supposed to work. > > Dave > -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
