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  1. OpenShift Virtualization
  2. CNV-72106

[Tracker] hotplug on rhel 9/10 guests show wrong cpu

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      Description of problem:

      When running a VM with a rhel10/rhel9 image the CPU cores shown on the guest OS using the command "nproc" show wrong CPU number.
The VMI status field and the VM spec do show the correct number.

      Version-Release number of selected component (if applicable):

      4.20/4.21

      How reproducible:

      100%

      Steps to Reproduce:

      1. Create a VM with 4 CPU threads and 8 maxSockets CPU
2. Change the spec to 6 CPU threads
3. Wait for migration to finish

      Actual results:

      The VM status and spec show 6 CPU while the command inside the guest "nproc" show 4, and "nproc --all" show 8.

      Expected results:

      The guest OS command "nproc" should show 6

      Additional info:

      This does work for rhel8, indicating the bug is a result of recent Kernel changes

        1. hotplug_vmi_yaml.yaml
          7 kB
        2. hotplug_vm_domxml
          17 kB

              sgott@redhat.com Stuart Gott
              rhn-support-rkishner Roni Kishner
              Roni Kishner
              Denys Shchedrivyi Denys Shchedrivyi
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                Created:
                Updated:
                Resolved: