Re: KVM call agenda for Jan 26

Avi Kivity
2010-01-26T14:37:14Z

On 01/26/2010 04:32 PM, Anthony Liguori wrote:
>>>> It would need to know which cpuid bits qemu supports. Only qemu
>>>> knows that.
>>>
>>> I'm not sure I understand why. Can you elaborate?
>>>
>>
>> If qemu doesn't recognize -cpu qemu64,+nx, then no amount of hardware
>> and kvm.ko support will allow the user to enable nx in a guest.
>
>
> Does -cpu host filter out flags that we don't know about? I'm pretty
> sure it doesn't. Since we're planning on moving to -cpu host by
> default for KVM, does it really matter?

People who use discovery tools are probably setting up a migration
cluster. They aren't going to use -cpu host.

>
> Oh, I was under the impression that the tool was meant to be software
> agnostic. IOW, here are all the virt features your hardware supports.

That's /proc/cpuinfo, we should just extend it, maybe that's what Alex
meant, but I'd like to see something more capable.

--
error compiling committee.c: too many arguments to function