@anthropy I allocated 32gb. I'm not sure about ballooning, but here's the command I use:taskset -c ${CPU_CORE} qemu-system-x86_64 \
-name "Windows 10" \
-machine q35,mem-merge=off,vmport=off \
-accel kvm \
-accel kvm,kernel-irqchip=on \
-cpu host,+topoext,kvm=off,hv_spinlocks=0x1fff,hv_relaxed,hv_vapic,hv_time,hv_crash,hv_reset,hv_vpindex,hv_runtime,hv_synic,hv_stimer,hv_vendor_id=Gigabyte \
-smp 12,sockets=1,cores=6,threads=2 \
-global ICH9-LPC.disable_s3=1 \
-global ICH9-LPC.disable_s4=1 \
-m ${RAM_SIZE} \
-mem-prealloc \
-rtc clock=host,base=localtime,driftfix=slew \
-global kvm-pit.lost_tick_policy=delay \
-overcommit mem-lock=off \
-global kvm-pit.lost_tick_policy=discard \
-nographic \
-vga none \
-serial none \
-parallel none \
-k en-us \
-msg timestamp=on \
-spice port=${SPICE_PORT},disable-ticketing=on \
-usb \
-audio driver=pipewire,model=hda,id=snd1 \
-device ioh3420,chassis=1,bus=pcie.0,addr=03.0,id=ioh3420-root-port-1 \
-device ivshmem-plain,memdev=ivshmem,bus=pcie.0 \
-object memory-backend-file,id=ivshmem,share=on,mem-path=/dev/shm/looking-glass,size=128M \
-chardev socket,id=chrtpm,path=/var/run/emulated_tpm/swtpm-sock \
-tpmdev emulator,id=tpm0,chardev=chrtpm -device tpm-tis,tpmdev=tpm0 \
-object iothread,id=iothread0 \
-netdev bridge,id=virbr0 \
-device virtio-net-pci,netdev=virbr0,id=nic1 \
-object input-linux,id=kbd1,evdev=${EV_KBD},grab_all=on,repeat=on,grab-toggle=alt-alt \
-object input-linux,id=mouse1,evdev=${EV_MOUSE} \
-device virtio-mouse-pci \
-device virtio-keyboard-pci \
-device vfio-pci,host=${VGA_ADDR},bus=ioh3420-root-port-1,addr=00.0,x-pci-sub-device-id=${VGA_SSID},x-pci-sub-vendor-id=${VGA_SVID},multifunction=on,x-vga=on \
-drive file=${KVM_CODE},if=pflash,format=raw,unit=0,readonly=on \
-drive file=${KVM_VARS},if=pflash,format=raw,unit=1 \
-device virtio-scsi-pci,iothread=iothread0,num_queues=8,id=scsi \
-drive file="${KVM_DISK}",index=0,media=disk,format=raw,if=none,aio=native,cache.direct=on,id=disk \
-drive file="${KVM_DISK_2}",index=1,media=disk,format=raw,if=none,aio=native,cache.direct=on,id=disk2 \
-device scsi-hd,drive=disk \
-device scsi-hd,drive=disk2 \
-drive file="${KVM_OPTI}",index=1,media=cdrom \
-drive file="${KVM_CDRV}",index=2,media=cdrom \
-device usb-tablet ${USB_DEVS} \
-boot menu=on \
-chardev stdio,mux=on,id=monitor-0 \
-mon chardev=monitor-0 \
-chardev socket,id=char0,path=/tmp/vhostqemu \
-device vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=Host \
-object memory-backend-memfd,id=vfsmem,size=${RAM_SIZE},share=on \
-numa node,memdev=vfsmem
Volpeon 
Definitely going to report it, though