Description of problem:
We have been trying to set the NUMA affinity of specific VM using libvirt by adding this into the VM config:
<numatune>
<memory mode='strict' nodeset='1'/>
</numatune>
This should set the correct memory and vcpu affinity to a specific NUMA node. The memory affinity was right:
PID Node 0 Node 1 Node 2 Node 3 Node 4 Node 5 Node 6 Node 7 Total
--------------- ------ ------ ------ ------ ------ ------ ------ ------ -----
7103 (qemu-kvm) 0 2126 2 2 2 2 1 2 2198

However, the emulator and vcpus have set affinity to a different NUMA node:

1. taskset -cp 7103
   pid 7103's current affinity list: 12-15,44-47

Version-Release number of selected component (if applicable):
libvirt-8.5.0-7.el9_1.x86_64

How reproducible:
always

Steps to Reproduce:
1. Install hypervisor with RHEL9.1.0 and virtualization packages
2. Install VM
3. Add this into the VM config:
<numatune>
<memory mode='strict' nodeset='1'/>
</numatune>
<vcpu placement='auto'>8</vcpu>

4. Start VM
5. Check memory affinity using numastat -c qemu-kvm
6. Check CPU affinity using taskset -cp <PID>

Actual results:
Correct memory, but incorrect CPU affinity.

Expected results:
Correct memory and CPU affinity list.

Additional info:
We can provide you with a hypervisor with many NUMA nodes for further investigation of this issue.