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Error: Deprecated CPU topology (considered invalid): Unsupported cluster parameter musn't be specified as 1
Description of problem:
warning: Deprecated CPU topology (considered invalid): Unsupported clusters parameter mustn't be specified as 1
VM does not start
What I've tried so far to fix:
- Removed the offending `clusters="1"` parameter in the XML, both via virsh edit and virt-manager but the sucker comes back every time!
- Creating a completely new VM from scratch, just keeping the qcow2 for Windows. What happens then is funny: The initial setup goes well. Machine type automatically gets set to q35 version 9.0. After setting up my cores (pinning) for the VM (7C/14T for the VM 1C/2T for host), there is no "clusters" parameter anymore. So the first start went well. After a RESTART of the whole host machine and subsequent launch of the VM guess what happened? The "clusters" thing is back in full swing.
Steps to reproduce:
1. Create Windows 11 VM with virt-manager
2. Try to do core pinning and setting up the following in virt manager before
- Copy CPU configuration from host (host-passthrough)
- Manually set CPU structure via GUI to 1 Socket, 7 Cores, 2 Threads on an 8 Core (in my case 11900k)
3. Observe result in XML being:
`<topology sockets="1" dies="1" clusters="1" cores="7" threads="2"/>`
Again, the "clusters" entry leads to the VM not starting. Removing it doesn't work, it comes back straight away. I tried in virt-manager as well as with virsh edit.
Additional information:
My core pinning for reference:
```
<vcpu placement="static">14</vcpu>
<iothreads>1</iothreads>
<cputune>
<vcpupin vcpu="0" cpuset="0"/>
<vcpupin vcpu="1" cpuset="8"/>
<vcpupin vcpu="2" cpuset="1"/>
<vcpupin vcpu="3" cpuset="9"/>
<vcpupin vcpu="4" cpuset="2"/>
<vcpupin vcpu="5" cpuset="10"/>
<vcpupin vcpu="6" cpuset="3"/>
<vcpupin vcpu="7" cpuset="11"/>
<vcpupin vcpu="8" cpuset="4"/>
<vcpupin vcpu="9" cpuset="12"/>
<vcpupin vcpu="10" cpuset="5"/>
<vcpupin vcpu="11" cpuset="13"/>
<vcpupin vcpu="12" cpuset="6"/>
<vcpupin vcpu="13" cpuset="14"/>
<emulatorpin cpuset="7,15"/>
<iothreadpin iothread="1" cpuset="7,15"/>
</cputune>
```
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