Hi All, *How to check if 'Per-node memory binding' is supported in this libvirt version?* PS: I have the #virsh version: Compiled against library: libvirt 1.2.*9* Using library: libvirt 1.2.9 Using API: QEMU 1.2.9 Running hypervisor: QEMU 2.0.0 on host # uname -a Linux nfv 3.13.0-40-generic #69-Ubuntu SMP Thu Nov 13 17:53:56 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux # lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.1 LTS Release: 14.04 Codename: trusty #virsh start SomeOSOS-30-5-0-0_rls_743 error: Failed to start domain AlteonOS-30-5-0-0_rls_743 error: unsupported configuration: Per-node memory binding is not supported with this QEMU #virsh dumpxml SomeOSOS-30-5-0-0_rls_743 <domain type='kvm'> <name>SomeOSOS-30-5-0-0_rls_743</name> <uuid>c0eac6f0-e519-459d-978d-bd5b2da0be45</uuid> <memory unit='KiB'>33554432</memory> <currentMemory unit='KiB'>33554432</currentMemory> <vcpu placement='static'>8</vcpu> <cputune> <vcpupin vcpu='0' cpuset='0'/> <vcpupin vcpu='1' cpuset='2'/> <vcpupin vcpu='2' cpuset='4'/> <vcpupin vcpu='3' cpuset='6'/> <vcpupin vcpu='4' cpuset='1'/> <vcpupin vcpu='5' cpuset='3'/> <vcpupin vcpu='6' cpuset='5'/> <vcpupin vcpu='7' cpuset='7'/> </cputune> <numatune> <memory mode='strict' nodeset='0-1'/> <memnode cellid='0' mode='strict' nodeset='0'/> <memnode cellid='1' mode='strict' nodeset='1'/> </numatune> <os> <type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>Westmere</model> <feature policy='require' name='pdpe1gb'/> <numa> <cell id='0' cpus='0,1,2,3' memory='16777216'/> <cell id='1' cpus='4,5,6,7' memory='16777216'/> </numa> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/var/lib/libvirt/images/SomeOSOS-30-5-0-0_rls_743.qcow2'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <interface type='bridge'> <mac address='52:54:00:4b:e8:9b'/> <source bridge='mgmt'/> <model type='e1000'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x05' slot='0x00' function='0x0'/> </source> <rom bar='off'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x42' slot='0x00' function='0x0'/> </source> <rom bar='off'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </memballoon> </devices> </domain> Regards.