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

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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.



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Peter Lieven

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