Hi,
Thank you for your answer.
I use Debian Stretch as OS.
/usr/bin/qemu-system-x86_64 --version
QEMU emulator version 2.8.1(Debian 1:2.8+dfsg-6+deb9u3)
command line:
root 22999 0.0 0.0 15540 936 pts/0 S+ 23:55 0:00 \_ grep one-13
oneadmin 20157 0.2 6.6 2969960 2165076 ? Sl Apr05 4:37 /usr/bin/qemu-system-x86_64 -name guest=one-13,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-14-one-13/master-key.aes -machine pc-i440fx-2.8,accel=kvm,usb=off,dump-guest-core=off -m 2048 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid cd852157-cef3-47eb-a676-de96b28ccade -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-14-one-13/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device lsi,id=scsi0,bus=pci.0,addr=0x4 -drive file=/var/lib/one//datastores/0/13/disk.0,format=qcow2,if=none,id=drive-scsi0-0-0,cache=none -device scsi-hd,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0,bootindex=1 -drive file=/var/lib/one//datastores/0/13/disk.1,format=raw,if=none,id=drive-ide0-0-0,readonly=on -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -netdev tap,fd=26,id=hostnet0,vhost=on,vhostfd=28 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=02:00:5e:82:d6:99,bus=pci.0,addr=0x3 -vnc 0.0.0.0:13 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on