I recently migrated my unraid system over to new hardware (Intel i9-13900k from old threadripper). I am trying to get WSL2 running in a windows VM and it seems every time I enable Virtual Machine Platform the VM refuses to boot and goes to Startup Repair. Frustratingly it won't give me the safe boot option or allow me to restore from a restore point so to troubleshoot my only option is to continually reinstall the OS.
<?xml version='1.0' encoding='UTF-8'?>
<domain type='kvm' id='8'>
<name>matt-ws-vm</name>
<uuid>59d27f82-1b9f-b464-d414-569246da5e34</uuid>
<metadata>
<vmtemplate xmlns="unraid" name="Windows 11" icon="windows11.png" os="windowstpm"/>
</metadata>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>8388608</currentMemory>
<memoryBacking>
<nosharepages/>
</memoryBacking>
<vcpu placement='static'>16</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='0'/>
<vcpupin vcpu='1' cpuset='1'/>
<vcpupin vcpu='2' cpuset='2'/>
<vcpupin vcpu='3' cpuset='3'/>
<vcpupin vcpu='4' cpuset='4'/>
<vcpupin vcpu='5' cpuset='5'/>
<vcpupin vcpu='6' cpuset='6'/>
<vcpupin vcpu='7' cpuset='7'/>
<vcpupin vcpu='8' cpuset='8'/>
<vcpupin vcpu='9' cpuset='9'/>
<vcpupin vcpu='10' cpuset='10'/>
<vcpupin vcpu='11' cpuset='11'/>
<vcpupin vcpu='12' cpuset='12'/>
<vcpupin vcpu='13' cpuset='13'/>
<vcpupin vcpu='14' cpuset='14'/>
<vcpupin vcpu='15' cpuset='15'/>
</cputune>
<resource>
<partition>/machine</partition>
</resource>
<type arch='x86_64' machine='pc-i440fx-7.1'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi-tpm.fd</loader>
<nvram>/etc/libvirt/qemu/nvram/59d27f82-1b9f-b464-d414-569246da5e34_VARS-pure-efi-tpm.fd</nvram>
<features>
<acpi/>
<apic/>
<hyperv mode='custom'>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='none'/>
</hyperv>
</features>
<cpu mode='host-passthrough' check='none' migratable='on'>
<topology sockets='1' dies='1' cores='8' threads='2'/>
<cache mode='passthrough'/>
<clock offset='localtime'>
<timer name='hypervclock' present='yes'/>
<timer name='hpet' present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/local/sbin/qemu</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='writeback'/>
<source file='/mnt/user/domains/matt-ws-vm/vdisk1.img' index='3'/>
<backingStore/>
<target dev='hdc' bus='virtio'/>
<boot order='1'/>
<alias name='virtio-disk2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/Win11_22H2_English_x64v1.iso' index='2'/>
<backingStore/>
<target dev='hda' bus='ide'/>
<readonly/>
<boot order='2'/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/virtio-win-0.1.225-2.iso' index='1'/>
<backingStore/>
<target dev='hdb' bus='ide'/>
<readonly/>
<alias name='ide0-0-1'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<alias name='usb'/>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<alias name='usb'/>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<alias name='usb'/>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='virtio-serial' index='0'>
<alias name='virtio-serial0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:73:2b:d0'/>
<source bridge='br0'/>
<target dev='vnet7'/>
<model type='virtio-net'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/1'/>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<channel type='unix'>
<source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-8-matt-ws-vm/org.qemu.guest_agent.0'/>
<target type='virtio' name='org.qemu.guest_agent.0' state='disconnected'/>
<alias name='channel0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='tablet' bus='usb'>
<alias name='input0'/>
<address type='usb' bus='0' port='1'/>
</input>
<input type='mouse' bus='ps2'>
<alias name='input1'/>
</input>
<input type='keyboard' bus='ps2'>
<alias name='input2'/>
</input>
<tpm model='tpm-tis'>
<backend type='emulator' version='2.0' persistent_state='yes'/>
<alias name='tpm0'/>
<graphics type='vnc' port='5901' autoport='yes' websocket='5701' listen='0.0.0.0' keymap='en-us'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<audio id='1' type='none'/>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+0:+100</label>
<imagelabel>+0:+100</imagelabel>
</seclabel>
</domain>
Before you ask, yes, I have the kernel module installed and I have already tried adding the following line into the CPU portion of my config.
<feature policy='require' name='vmx'/>
<cpu mode='host-passthrough' check='none' migratable='on'>
<topology sockets='1' dies='1' cores='8' threads='2'/>
<cache mode='passthrough'/>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
<topology sockets='1' dies='1' cores='20' threads='1'/>
<feature policy='disable' name='hypervisor'/>
<feature policy='require' name='vmx'/>
<feature policy='disable' name='mpx'/>
I also had to add <feature policy='disable' name='mpx'/> which wasn't in the superuser post. I was getting an error when booting my VM so there may be some modification needed based on CPU model. With this I was able to get WSL2 working! I'm not sure if this will greatly impact performance. I'm hoping someone more knowledgeable like @SimonF may be willing to comment as I've found him to be all knowing when it comes to Unraid and VMs!
<cpu mode='host-passthrough' check='none' migratable='on'>
<topology sockets='1' dies='1' cores='8' threads='2'/>
<cache mode='passthrough'/>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
<topology sockets='1' dies='1' cores='20' threads='1'/>
<feature policy='disable' name='hypervisor'/>
<feature policy='require' name='vmx'/>
<feature policy='disable' name='mpx'/>
I also had to add <feature policy='disable' name='mpx'/> which wasn't in the superuser post. I was getting an error when booting my VM so there may be some modification needed based on CPU model. With this I was able to get WSL2 working! I'm not sure if this will greatly impact performance. I'm hoping someone more knowledgeable like @SimonF may be willing to comment as I've found him to be all knowing when it comes to Unraid and VMs!
<cpu mode='host-passthrough' check='none' migratable='on'>
<topology sockets='1' dies='1' cores='8' threads='2'/>
<cache mode='passthrough'/>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
<topology sockets='1' dies='1' cores='20' threads='1'/>
<feature policy='disable' name='hypervisor'/>
<feature policy='require' name='vmx'/>
<feature policy='disable' name='mpx'/>
I also had to add <feature policy='disable' name='mpx'/> which wasn't in the superuser post. I was getting an error when booting my VM so there may be some modification needed based on CPU model. With this I was able to get WSL2 working! I'm not sure if this will greatly impact performance. I'm hoping someone more knowledgeable like @SimonF may be willing to comment as I've found him to be all knowing when it comes to Unraid and VMs!
I'm not really seeing a difference. I also ran comparisons with Geekbench and the difference in performance seems like none. I got a lower score when using host passthrough rather than emulated which was probably just by chance. If I am correct maybe this can be something that can be added as an option in the GUI down the line. I have WSL working fine and my server is sitting at idle right now with the VM running in this configuration. I'm not home right now so it's got to be 80 degrees Farenheit in my apartment with the AC off and my CPU is sitting at 37 degrees celcius currently. From my testing I see no difference other than nested virtualization working. If there is anything I can do to help test performance let me know!
I recently got a Razer Blade (Razer Blade 17 _2022_ - RZ09-0423) which shipped with a 12th Gen Intel® Core™ i9-12900H × 20. Using
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
was not going to work.
Before I installed my Windows 11 VM under KVM in Ubuntu 22.04.3, I edited the CPU XML configuration, and removed host-passthrough and manually used just this. Note: "cores=8" because the number of vCPUs allocated to my Windows 11 machine was 8. You will want these numbers to match, or Virtual Machine Manager will complain.
<cpu mode="custom" match="exact" check="partial">
<model fallback="allow">Broadwell-noTSX-IBRS</model>
<topology sockets="1" dies="1" cores="8" threads="1"/>
<feature policy="disable" name="hypervisor"/>
<feature policy="require" name="vmx"/>
<feature policy="disable" name="mpx"/>
<cpu mode="custom" match="exact" check="partial">
<model fallback="allow">Broadwell-noTSX-IBRS</model>
<feature policy="require" name="vmx"/>
<cpu mode="custom" match="exact" check="partial">
<model fallback="allow">Broadwell-noTSX-IBRS</model>
<feature policy="require" name="vmx"/>
<cpu mode='custom' match='exact' check='full'>
<model fallback='forbid'>Broadwell-noTSX-IBRS</model>
<topology sockets='1' dies='1' cores='8' threads='2'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='vme'/>
<feature policy='disable' name='pcid'/>
<feature policy='require' name='f16c'/>
<feature policy='require' name='rdrand'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='arat'/>
<feature policy='require' name='xsaveopt'/>
<feature policy='require' name='abm'/>
<cpu mode='host-passthrough' check='none' migratable='on'>
<topology sockets='1' dies='1' cores='8' threads='2'/>
<cache mode='passthrough'/>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
<topology sockets='1' dies='1' cores='20' threads='1'/>
<feature policy='disable' name='hypervisor'/>
<feature policy='require' name='vmx'/>
<feature policy='disable' name='mpx'/>
I also had to add <feature policy='disable' name='mpx'/> which wasn't in the superuser post. I was getting an error when booting my VM so there may be some modification needed based on CPU model. With this I was able to get WSL2 working! I'm not sure if this will greatly impact performance. I'm hoping someone more knowledgeable like @SimonF may be willing to comment as I've found him to be all knowing when it comes to Unraid and VMs!
<domain type='kvm'>
<name>Windows 11 WSL</name>
<uuid>8008103e-ccc2-a237-89e3-ac4cfc28326e</uuid>
<metadata>
<vmtemplate xmlns="unraid" name="Windows 11" icon="windows11.png" os="windowstpm" storage="vmpoolzfs"/>
</metadata>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>8388608</currentMemory>
<memoryBacking>
<nosharepages/>
</memoryBacking>
<vcpu placement='static'>4</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='8'/>
<vcpupin vcpu='1' cpuset='9'/>
<vcpupin vcpu='2' cpuset='10'/>
<vcpupin vcpu='3' cpuset='11'/>
</cputune>
<type arch='x86_64' machine='pc-i440fx-8.2'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi-tpm.fd</loader>
<nvram>/etc/libvirt/qemu/nvram/8008103e-ccc2-a237-89e3-ac4cfc28326e_VARS-pure-efi-tpm.fd</nvram>
<features>
<acpi/>
<apic/>
<hyperv mode='custom'>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vpindex state='on'/>
<synic state='on'/>
<stimer state='on'/>
<vendor_id state='on' value='none'/>
</hyperv>
</features>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
<topology sockets='1' dies='1' clusters='1' cores='4' threads='1'/>
<feature policy='disable' name='mpx'/>
<feature policy='disable' name='hypervisor'/>
<feature policy='require' name='vmx'/>
<clock offset='localtime'>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/local/sbin/qemu</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='writeback'/>
<source file='/mnt/user/domains2/Windows 11 WSL/vdisk1.img'/>
<target dev='hdc' bus='virtio'/>
<serial>vdisk1</serial>
<boot order='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/Win11_22H2_EnglishInternational_x64v2.iso'/>
<target dev='hda' bus='sata'/>
<readonly/>
<boot order='2'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/virtio-win-0.1.96.iso'/>
<target dev='hdb' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='pci' index='0' model='pci-root'/>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</controller>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:ef:66:65'/>
<source bridge='br0'/>
<model type='virtio-net'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' 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='unix'>
<target type='virtio' name='org.qemu.guest_agent.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'/>
<tpm model='tpm-tis'>
<backend type='emulator' version='2.0' persistent_state='yes'/>
<graphics type='vnc' port='-1' autoport='yes' websocket='-1' listen='0.0.0.0' sharePolicy='ignore'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<audio id='1' type='none'/>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1a' function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
</devices>
</domain>
<domain type='kvm'>
<name>Windows 11 WSL</name>
<uuid>8008103e-ccc2-a237-89e3-ac4cfc28326e</uuid>
<metadata>
<vmtemplate xmlns="unraid" name="Windows 11" icon="windows11.png" os="windowstpm" storage="vmpoolzfs"/>
</metadata>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>8388608</currentMemory>
<memoryBacking>
<nosharepages/>
</memoryBacking>
<vcpu placement='static'>4</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='8'/>
<vcpupin vcpu='1' cpuset='9'/>
<vcpupin vcpu='2' cpuset='10'/>
<vcpupin vcpu='3' cpuset='11'/>
</cputune>
<type arch='x86_64' machine='pc-i440fx-8.2'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi-tpm.fd</loader>
<nvram>/etc/libvirt/qemu/nvram/8008103e-ccc2-a237-89e3-ac4cfc28326e_VARS-pure-efi-tpm.fd</nvram>
<features>
<acpi/>
<apic/>
<hyperv mode='custom'>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vpindex state='on'/>
<synic state='on'/>
<stimer state='on'/>
<vendor_id state='on' value='none'/>
</hyperv>
</features>
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
<topology sockets='1' dies='1' clusters='1' cores='4' threads='1'/>
<feature policy='disable' name='mpx'/>
<feature policy='disable' name='hypervisor'/>
<feature policy='require' name='vmx'/>
<clock offset='localtime'>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/local/sbin/qemu</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='writeback'/>
<source file='/mnt/user/domains2/Windows 11 WSL/vdisk1.img'/>
<target dev='hdc' bus='virtio'/>
<serial>vdisk1</serial>
<boot order='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/Win11_22H2_EnglishInternational_x64v2.iso'/>
<target dev='hda' bus='sata'/>
<readonly/>
<boot order='2'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/virtio-win-0.1.96.iso'/>
<target dev='hdb' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='pci' index='0' model='pci-root'/>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</controller>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:ef:66:65'/>
<source bridge='br0'/>
<model type='virtio-net'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' 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='unix'>
<target type='virtio' name='org.qemu.guest_agent.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'/>
<tpm model='tpm-tis'>
<backend type='emulator' version='2.0' persistent_state='yes'/>
<graphics type='vnc' port='-1' autoport='yes' websocket='-1' listen='0.0.0.0' sharePolicy='ignore'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<audio id='1' type='none'/>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1a' function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
</devices>
</domain>
I'm not exactly sure why but after 20+ mins of solid gaming without any FPS drops / lagging the VM starts to lag hard, it never locks up totally but FPS drop to 10 FPS. Sometimes the VM recovers after 1min but it quickly drops to 10fps again, other times the FPS drop and then starts bouncing between 10 to 60fps ( have set a global limit of 60fps ) but it never fully recovers until a fully shutdown and reboot of the VM.
The only reason I'm using a custom CPU passthrough is because its the only thing that allows Roblox to be played within a VM as mentioned in my previous comment. Ive exhausted all other avenues to achieve this and I have no idea why the custom CPU passthrough allows Roblox to work but it does. Sadly that brings other no serious issues along with it.
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