When trying to add a 9p filesystem to a guest, I get the qemu error "fsdev is not supported by this qemu build." (when starting the guest). I'm still looking at this. It seems to be something to do with the machine type causing the -fsdev option not to be registered inside qemu. I just wanted to record the problem here in case anyone else has any ideas. Full XML and qemu command line is below. Occurs with: libvirt-0.9.2-2.fc16.x86_64 2:qemu-system-x86-0.14.0-8.fc16.x86_64 Also occurs with the latest qemu & libvirt in Fedora 15, but reportedly not with older versions of qemu. Rich. ---------------------------------------------------------------------- <domain type='kvm'> <name>F14x64</name> <uuid>799ae7ca-23a2-f622-c691-48feebcddbe6</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu match='exact'> <model>core2duo</model> <vendor>Intel</vendor> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw'/> <source dev='/dev/vg_pin/F14x64'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </controller> <filesystem type='mount' accessmode='passthrough'> <source dir='/tmp'/> <target dir='org.kernel.tmp'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </filesystem> <interface type='network'> <mac address='52:54:00:18:04:63'/> <source network='default'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <channel type='unix'> <source mode='bind' path='/tmp/f14socket'/> <target type='virtio' name='org.libguestfs.channel.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='de'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <watchdog model='ib700' action='reset'/> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </memballoon> </devices> </domain> ---------------------------------------------------------------------- LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.14 -cpu core2duo -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name F14x64 -uuid 799ae7ca-23a2-f622-c691-48feebcddbe6 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/F14x64.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -boot c -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/dev/vg_pin/F14x64,if=none,id=drive-ide0-0-0,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -fsdev local,security_model=passthrough,id=fsdev-fs0,path=/tmp -device virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=org.kernel.tmp,bus=pci.0,addr=0x6 -netdev tap,fd=23,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:18:04:63,bus=pci.0,addr=0x4 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,path=/tmp/f14socket,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.libguestfs.channel.0 -usb -vnc 127.0.0.1:0 -k de -vga cirrus -device ib700,id=watchdog0 -watchdog-action reset -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 qemu-kvm: -fsdev local,security_model=passthrough,id=fsdev-fs0,path=/tmp: there is no option group "fsdev" fsdev is not supported by this qemu build. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/