Start VM with 1Gi hugepage in VM yaml file, VM is started but it's without 1Gi hugepage

CNV 4.16.1, iib:772966

sh-5.1$ rpm -qa|grep libvirt
libvirt-libs-10.0.0-6.3.el9_4.x86_64
libvirt-client-10.0.0-6.3.el9_4.x86_64
libvirt-daemon-common-10.0.0-6.3.el9_4.x86_64
libvirt-daemon-log-10.0.0-6.3.el9_4.x86_64
libvirt-daemon-driver-qemu-10.0.0-6.3.el9_4.x86_64

sh-5.1$ rpm -qa|grep qemu-kvm
qemu-kvm-common-8.2.0-11.el9_4.4.x86_64
qemu-kvm-device-display-virtio-gpu-8.2.0-11.el9_4.4.x86_64
qemu-kvm-core-8.2.0-11.el9_4.4.x86_64
qemu-kvm-device-display-virtio-gpu-pci-8.2.0-11.el9_4.4.x86_64
qemu-kvm-device-usb-host-8.2.0-11.el9_4.4.x86_64
qemu-kvm-device-usb-redirect-8.2.0-11.el9_4.4.x86_64

100%

1. Create VM with hugepage settings in VM yaml file, more details in file: asb-vm-dv-ocs-hugepage.yaml
    spec:
      domain:
        resources:
          requests:
            memory: "2Gi"
            cpu: "4"
        memory:
          hugepages:
            pageSize: "1Gi"

#oc create -f /tmp/asb-vm-dv-ocs-hugepage.yaml
virtualmachine.kubevirt.io/asb-vm-dv-ocs-hugepage created

Check VM is running:
#oc get vm
NAME                     AGE   STATUS    READY
asb-vm-dv-ocs-hugepage   14m   Running   True

2. Check VM xml, there is no memoryBacking hugepages in VM xml, the VM is not using hugepages memory.
--------------------------
  <memoryBacking>
    <hugepages/>
    <source type='memfd'/>
  </memoryBacking>
--------------------------

#oc get pod|grep virt-launcher
virt-launcher-asb-vm-dv-ocs-hugepage-4gz9q   1/1     Running   0          23s

#oc rsh virt-launcher-asb-vm-dv-ocs-hugepage-4gz9q
sh-5.1$ virsh list --all
Authorization not available. Check if polkit service is running or see debug message for more information.
 Id   Name                             State
------------------------------------------------
 1    default_asb-vm-dv-ocs-hugepage   running

sh-5.1$ virsh dumpxml default_asb-vm-dv-ocs-hugepage| grep hugepages -A 10
<No output>

sh-5.1$ virsh dumpxml default_asb-vm-dv-ocs-hugepage|grep memory -A 10
Authorization not available. Check if polkit service is running or see debug message for more information.
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static' current='2'>8</vcpu>
  <vcpus>
    <vcpu id='0' enabled='yes' hotpluggable='no' order='1'/>
    <vcpu id='1' enabled='yes' hotpluggable='yes' order='2'/>
    <vcpu id='2' enabled='no' hotpluggable='yes'/>
    <vcpu id='3' enabled='no' hotpluggable='yes'/>
    <vcpu id='4' enabled='no' hotpluggable='yes'/>
    <vcpu id='5' enabled='no' hotpluggable='yes'/>
    <vcpu id='6' enabled='no' hotpluggable='yes'/>
--
      <cell id='0' cpus='0-7' memory='2097152' unit='KiB'/>
    </numa>
  </cpu>

3. Check on node, there are allocatable 1Gi hugepages: 4Gi, and no 1Gi hugepages are allocated.

#oc get vmi
NAME                     AGE   PHASE     IP             NODENAME                                         READY
asb-vm-dv-ocs-hugepage   38m   Running   10.129.0.255   cnv-qe-infra-04##   True

#oc debug node/cnv-qe-infra-04##
sh-5.1# cat /proc/sys/vm/nr_hugepages
256
sh-5.1# cat /proc/cmdline 
BOOT_IMAGE=(hd0,gpt3)/boot/ostree/rhcos-39eeada61a2ec1055205a9b2b0506a8a707f28f9cf243571ddcdfdee5c1afd8c/vmlinuz-5.14.0-427.26.1.el9_4.x86_64 rw ostree=/ostree/boot.0/rhcos/39eeada61a2ec1055205a9b2b0506a8a707f28f9cf243571ddcdfdee5c1afd8c/0 ignition.platform.id=metal ip=dhcp fips=1 boot=LABEL=boot root=UUID=32caff12-0a11-4b20-ae00-097a24ae42ab rw rootflags=prjquota intel_iommu=on iommu=pt default_hugepagesz=2M hugepages=256 hugepagesz=1G hugepages=4 systemd.unified_cgroup_hierarchy=1 cgroup_no_v1=all psi=1

#oc describe node cnv-qe-infra-04##|grep Allocatable -A 10
Allocatable:
  cpu:                            111500m
  devices.kubevirt.io/kvm:        1k
  devices.kubevirt.io/tun:        1k
  devices.kubevirt.io/vhost-net:  1k
  ephemeral-storage:              1437506328243
  hugepages-1Gi:                  4Gi
  hugepages-2Mi:                  512Mi
  memory:                         125552208Ki
  nvidia.com/GA107GL_Ampere_A2:   1
  nvidia.com/GRID_A2_2Q:          0

#oc describe node cnv-qe-infra-04.cnvqe3.lab.eng.rdu2.redhat.com|grep Allocated -A 15
Allocated resources:
  (Total limits may be over 100 percent, i.e., overcommitted.)
  Resource                       Requests       Limits
  --------                       --------       ------
  cpu                            6985m (6%)     510m (0%)
  memory                         12307Mi (10%)  1224Mi (0%)
  ephemeral-storage              50M (0%)       0 (0%)
  hugepages-1Gi                  0 (0%)         0 (0%)
  hugepages-2Mi                  0 (0%)         0 (0%)
  devices.kubevirt.io/kvm        1              1
  devices.kubevirt.io/tun        1              1
  devices.kubevirt.io/vhost-net  1              1
  nvidia.com/GA107GL_Ampere_A2   0              0
  nvidia.com/GRID_A2_2Q          0              0
  nvidia.com/GRID_A2_4Q          0              0
Events:                          <none>

In step1: VM is created with 1Gi hugepages
In step2: Login into virt-launcher pod, check the VM xml include the memoryBacking hugepages part:
-----------------------------
  <memoryBacking>     
  <hugepages/>     
    <source type='memfd'/>   
</memoryBacking> 
----------------------------
In step3: Check on the node, the allocated hugepages and allocatable hugepages are correct