Max memory on VM (debian bullseye)

[Wilm Boerhout]

I installed and configured KVM on a HP Zbook 15 laptop with 2x4 CPUs and 24GB of memory

OS is Debian bullseye

 

No matter what I try, any VM with > 1GB virtual memory gives an error message on start:

 

Cannot set up guest memory,’pc.ram’: invalid argument.

 

In the target XML file, the amount of memory (I need 12GB for my VM) is expressed in KiB and appears correct.

 

Any suggestions?

 

/Wilm

 

<!--

WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE

OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:

  virsh edit VMSx86

or other application using the libvirt API.

-->

 

<domain type='kvm'>

  <name>VMSx86</name>

  <uuid>adb2de34-d2b9-4c23-96dc-f2ee9ab2977a</uuid>

  <memory unit='KiB'>12582912</memory>

  <currentMemory unit='KiB'>12582912</currentMemory>

  <vcpu placement='static'>2</vcpu>

  <os>

    <type arch='i686' machine='pc-q35-5.2'>hvm</type>

    <loader readonly='yes' type='pflash'>/usr/share/OVMF/OVMF_CODE.fd</loader>

    <nvram>/var/lib/libvirt/qemu/nvram/VMSx86_VARS.fd</nvram>

    <bootmenu enable='yes'/>

  </os>

  <features>

    <acpi/>

    <apic/>

    <pae/>

    <vmport state='off'/>

  </features>

  <cpu mode='host-model' check='partial'/>

  <clock offset='utc'>

    <timer name='rtc' tickpolicy='catchup'/>

    <timer name='pit' tickpolicy='delay'/>

    <timer name='hpet' present='no'/>

  </clock>

  <on_poweroff>destroy</on_poweroff>

  <on_reboot>restart</on_reboot>

  <on_crash>destroy</on_crash>

  <pm>

    <suspend-to-mem enabled='no'/>

    <suspend-to-disk enabled='no'/>

  </pm>

  <devices>

    <emulator>/usr/bin/qemu-system-i386</emulator>

    <disk type='file' device='cdrom'>

      <driver name='qemu' type='raw'/>

      <target dev='sda' bus='sata'/>

      <readonly/>

      <boot order='1'/>

      <address type='drive' controller='0' bus='0' target='0' unit='0'/>

    </disk>

    <disk type='file' device='disk'>

      <driver name='qemu' type='raw'/>

      <source file='/vdisk/sysdisk.img'/>

      <target dev='sdb' bus='sata'/>

      <address type='drive' controller='0' bus='0' target='0' unit='1'/>

    </disk>

    <disk type='file' device='disk'>

      <driver name='qemu' type='raw'/>

      <source file='/vdisk/pagedump.img'/>

      <target dev='sdc' bus='sata'/>

      <address type='drive' controller='0' bus='0' target='0' unit='2'/>

    </disk>

    <disk type='file' device='disk'>

      <driver name='qemu' type='raw'/>

      <source file='/vdisk/data.img'/>

      <target dev='sdd' bus='sata'/>

      <address type='drive' controller='0' bus='0' target='0' unit='3'/>

    </disk>

    <controller type='usb' index='0' model='ich9-ehci1'>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x7'/>

    </controller>

    <controller type='usb' index='0' model='ich9-uhci1'>

      <master startport='0'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x0' multifunction='on'/>

    </controller>

    <controller type='usb' index='0' model='ich9-uhci2'>

      <master startport='2'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x1'/>

    </controller>

    <controller type='usb' index='0' model='ich9-uhci3'>

      <master startport='4'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x2'/>

    </controller>

    <controller type='sata' index='0'>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>

    </controller>

    <controller type='pci' index='0' model='pcie-root'/>

    <controller type='pci' index='1' model='pcie-root-port'>

      <model name='pcie-root-port'/>

      <target chassis='1' port='0x10'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>

    </controller>

    <controller type='pci' index='2' model='pcie-to-pci-bridge'>

      <model name='pcie-pci-bridge'/>

      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>

    </controller>

    <controller type='pci' index='3' model='pcie-root-port'>

      <model name='pcie-root-port'/>

      <target chassis='3' port='0x11'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>

    </controller>

    <controller type='pci' index='4' model='pcie-root-port'>

      <model name='pcie-root-port'/>

      <target chassis='4' port='0x12'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>

    </controller>

    <controller type='pci' index='5' model='pcie-root-port'>

      <model name='pcie-root-port'/>

      <target chassis='5' port='0x13'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>

    </controller>

    <controller type='virtio-serial' index='0'>

      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>

    </controller>

    <interface type='bridge'>

      <mac address='52:54:00:92:56:5b'/>

      <source bridge='br0'/>

      <model type='e1000'/>

      <address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0'/>

    </interface>

    <serial type='pty'>

      <target type='isa-serial' port='0'>

        <model name='isa-serial'/>

      </target>

    </serial>

    <console type='pty'>

      <target type='serial' port='0'/>

    </console>

    <channel type='spicevmc'>

      <target type='virtio' name='com.redhat.spice.0'/>

      <address type='virtio-serial' controller='0' bus='0' port='1'/>

    </channel>

    <input type='tablet' bus='usb'>

      <address type='usb' bus='0' port='1'/>

    </input>

    <input type='mouse' bus='ps2'/>

    <input type='keyboard' bus='ps2'/>

    <graphics type='spice' autoport='yes'>

      <listen type='address'/>

      <image compression='off'/>

    </graphics>

    <sound model='ich6'>

      <address type='pci' domain='0x0000' bus='0x02' slot='0x02' function='0x0'/>

    </sound>

    <video>

      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>

      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>

    </video>

    <redirdev bus='usb' type='spicevmc'>

      <address type='usb' bus='0' port='2'/>

    </redirdev>

    <redirdev bus='usb' type='spicevmc'>

      <address type='usb' bus='0' port='3'/>

    </redirdev>

    <memballoon model='virtio'>

      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>

    </memballoon>

  </devices>

</domain>