[Qemu-devel] Re: Live Migration of 32-bit Linux guest broken since 2.6.35-rc2

[Peter Lieven]

Avi Kivity wrote:
> On 06/08/2010 04:28 PM, Peter Lieven wrote:
> > > > i will retry the case later today and send info register output.
> > > > what is the recommended value for nx (and why)?
> > >
> > > Enabled (so you get no-execute memory protection).
> >
> > do you have a guideline which flags should be identical to ensure 
> > proper live migration?
> > i would like to do an automatic compare before life migration to 
> > avoid crashes.
>
> All of them [1].  If you have an asymmetric machine, you can disable 
> those flags with the -cpu switch.
>
> Note the default qemu cpu disables many flags, so if one machine has 
> sse4.2 and the other doesn't, migration will still work without 
> disabling anything.
which cpu model do you suggest for 4 core xeon cpus? -cpu host ?

how important is the match of the virtualization extensions?

thanks,
peter

> [1] Rather, all flags understood by qemu and kvm that are enabled by 
> the cpu model that you gave to qemu with -cpu.


--
Mit freundlichen Grüßen/Kind Regards

Peter Lieven

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