[Users] Good enough for KVM but not for OpenVZ 7?
vvs at virtuozzo.com
Sun Nov 12 00:24:17 MSK 2017
On 2017-11-11 09:34, Vasily Averin wrote:
> Dear Scott,
> thank you for reporting this problem.
> As far as I know Centos7 uses some old KVM version.
> OpenVz7 includes newer version and probably can have some additional restrictions?
> I've found that your Xeon E5530 was launched Q1'09 and related to Nehalem EP family
> So looks like it can lack "Unrestricted guest" feature, however I do now know how important it is for KVM.
> I expect it should work but not so effective as newer CPUs.
> I've requested comments of our KVM Team, hope they clarify the situation.
I got following feedback:
"It will work but is not officially supported neither by us nor by redhat.
Installer warns (at least _SHOULD_ warn) but should not prevent the installation."
> On 2017-11-11 01:52, Scott Dowdle wrote:
>> I have a Dell PowerEdge R710 rack mount server. It is a few years old and it has an Intel Xeon E5530 @ 2.40GHz. KVM likes it just fine and it passes a virt-host-validate with flying colors but OpenVZ 7's vmxcap says:
>> Unrestricted guest no
>> Looking that up I find:
>> "VMX Unrestricted Guest is an Intel microprocessor feature that is also called IA-32e mode. Running a VM in this mode requires minimal involvement from software. You can think of it as running a VM bare-metal with its own EPT. This feature is available only on Westmere processors and later."
>> I ended up installing CentOS 7 on it and KVM works fine.
>> What's the deal? Why this extra restriction? :(
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