Re: [Qemu-devel] [PATCH 2/2] KVM: Use -cpu best as default on x86

[Alexander Graf]

On 16.01.2012, at 20:30, Ryan Harper wrote:

> * Alexander Graf <address@hidden> [2012-01-08 17:53]:
>> When running QEMU without -cpu parameter, the user usually wants a sane
>> default. So far, we're using the qemu64/qemu32 CPU type, which basically
>> means "the maximum TCG can emulate".
> 
> it also means we all maximum possible migration targets.  Have you
> given any thought to migration with -cpu best? 

If you have the same boxes in your cluster, migration just works. If you don't, 
you usually use a specific CPU model that is the least dominator between your 
boxes either way.

The current kvm64 type is broken. Libgmp just abort()s when we pass it in. So 
anything is better than what we do today on AMD hosts :).


Alex