I have openstack running and kvm VMs are scheduled with cpu pinning. I have some requirement to enable hyper-threading but will this require redeploying the VMs due to the fact that the cores count and numbering will change?
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No, you will just adjust the domain xml files with updated pinning strategies. If your worried, I would remove CPU Pinning and make sure VM's boot fine before enabling Hyperthreading. Then after enabling you can mess around with domain xml. No need to 'Re-Deploy'
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