Re: Live Migration of 32-bit Linux guest broken since 2.6.35-rc2

Peter Lieven
2010-06-08T13:38:23Z

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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