KVM vs XEN vs VMware

[Magnus Runesson]

On Fri, 2007-05-04 at 04:32 +0900, Tomoki Taniguchi wrote:
> OK I started to follow the instructions on
> https://help.ubuntu.com/community/KVM
> 
> I ran
> "sudo modprobe kvm-intel"
> and I got the following response
> 
> FATAL: Error inserting kvm_intel
> (/lib/modules/2.6.20-15-generic/kernel/drivers/kvm/kvm-intel.ko):
> Operation not supported
> 
As Henning pointed out, not all mainboard suport the virtualization.
(Which I also should have pointed out, but I always forget that there
are such stupid companies on the market). Check your BIOS if there are
any configurations that disables VT. It may also help to upgrade the
BIOS.

I think it was Lenovo, that from the beginning did not have support in
BIOs for VT. This was solved with a BIOS upgrade.

/Magnus

> 
> On 5/4/07, Henning Sprang <henning_sprang at gmx.de> wrote:
> > > > vmx is listed under the flags  does this means my cpu supports VT?
> > > >
> > >
> > > Yes!
> > >
> > > This means you are able to run unmodified operating system as guests.
> > > You may use KVM or Xen.
> >
> > Not always. Some mainboards don't work well with Xen HVM, and probably
> > also with KVM, even if you have the correct CPU.
> >

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