On 21.12.2009, at 12:18, Michael S. Tsirkin wrote: > On Mon, Dec 21, 2009 at 01:12:26PM +0200, Avi Kivity wrote: >> On 12/20/2009 07:18 PM, Michael S. Tsirkin wrote: >>> >>>>> Hmm, then, shouldn't either kvm or qemu mask features that we do not >>>>> emulate well enough to make windows not crash? >>>>> >>>> -cpu host does that already, no? >>>> >>>> Alex >>>> >>> I expected so, but Avi here seems to say windows will crash if you >>> use a new CPU with it ... >>> >> >> No, Windows tries to detect changes in your hardware and assumes that if >> too many things change, you might be a pirate and requires you to phone >> their offices to re-authenticate. > > How often does a casual user upgrade his host CPU?
I tend to have my VM images on an NFS share and expect them to work properly on all PCs I work on. So I guess the answer is "often"? Alex
