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On 9/17/2019 7:44 AM, wang.ya wrote:
> But if add the property “hw:cpu_policy='dedicated'”, it will not correct 
> after serval live migrations.
> 
> Which means the live migrate can be success, but the vCPU pin are not 
> correct(two instance have serval same vCPU pin on same host).
> 

Is the race you're describing the same issue reported in this bug?

https://bugs.launchpad.net/nova/+bug/1829349

Also, what is the max_concurrent_live_migrations config option set to? 
That defaults to 1 but I'm wondering if you've changed it at all.

-- 

Thanks,

Matt