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Re: [Qemu-devel] cpuid problem in upstream qemu with kvm
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] cpuid problem in upstream qemu with kvm |
Date: |
Mon, 21 Dec 2009 13:38:53 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Mon, Dec 21, 2009 at 12:22:53PM +0100, Alexander Graf wrote:
>
> 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
Yes but you are not a casual user, are you? Consider a 64 bit guest to
see why moving a VM across machines needs some planning.
--
MST
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, (continued)
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Avi Kivity, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Andre Przywara, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Avi Kivity, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Jamie Lokier, 2009/12/22
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Avi Kivity, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Michael S. Tsirkin, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Alexander Graf, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm,
Michael S. Tsirkin <=
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Alexander Graf, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Michael S. Tsirkin, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Jamie Lokier, 2009/12/22
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Avi Kivity, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, David S. Ahern, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Michael S. Tsirkin, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, David S. Ahern, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Avi Kivity, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Avi Kivity, 2009/12/21
- Re: [Qemu-devel] cpuid problem in upstream qemu with kvm, Michael S. Tsirkin, 2009/12/21