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Increasing KVM Guest CPU by using virsh

First edit configuration xml using virsh edit. virsh edit opens an editor.


# virsh edit test_vm


When editor opens configuration xml, find containing vcpu placement element then change it according to your needs and save it.


<vcpu placement='static'>8</vcpu>


Then shutdown and start your vm:


# virsh shutdown test_vm
# virsh start test_vm


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