Hi, I am seeing a problem with a earlier working domain configuration. Here is the domain xml file. I am not getting the virsh console now. I am trying this on RHEL 6.0. Here is the list of steps that I am using: [root@krm1 test]# virsh define vmtest.xml Domain vmtest3 defined from vmtest.xml [root@krm1 test]# virsh start vmtest3 Domain vmtest3 started [root@krm1 test]# virsh console vmtest3 Connected to domain vmtest3 Escape character is ^] [root@krm1 test]# virsh dominfo vmtest3 Id: 2 Name: vmtest3 UUID: 2b38ff93-1bc6-c78c-1ed8-ffb936c86dac OS Type: hvm State: running CPU(s): 1 CPU time: 17.3s Max memory: 524288 kB Used memory: 524288 kB Persistent: yes Autostart: disable [root@krm1 test]# The state of the domain shows running. One more thing that i noted was that qemu-kvm is consuming 100% of the cpu. So not sure if the qemu-kvm has started properly. I am not sure how to debug the issue. Would appreciate some help on this. Some more information: I have attached following file /var/log/libvirt/qemu/vmtest3.log Executing the following command on the bash works fine and the VM comes up: /usr/libexec/qemu-kvm -M rhel6.0.0 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -drive file=/home/bharata/cgroup-scalability/test/test.qcow2 -nographic While executing the command in the vmtest3.log, the VM does not come at all. Here is the domain xml: <domain type='kvm'> <name>vmtest3</name> <memory>524288</memory> <vcpu>1</vcpu> <os> <type arch='i686'>hvm</type> <boot dev='hd'/> </os> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/home/bharata/cgroup-scalability/test/test.qcow2'/> <target dev='hda' bus='ide'/> </disk> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> </devices> </domain> Thanks, Nikunj LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin /usr/libexec/qemu-kvm -S -M rhel6.0.0 -cpu qemu32 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name vmtest3 -uuid 2b38ff93-1bc6-c78c-1ed8-ffb936c86dac -nographic -nodefconfig -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/vmtest3.monitor,server,nowait -mon chardev=monitor,mode=control -rtc base=utc -no-acpi -boot c -drive file=/home/bharata/cgroup-scalability/test/test.qcow2,if=none,id=drive-ide0-0-0,boot=on,format=qcow2 -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 09:53:22.536: debug : virCgroupNew:493 : New group /libvirt/qemu/vmtest3 09:53:22.536: debug : virCgroupDetect:230 : Detected mount/mapping 0:cpu at /cgroup/cpu in 09:53:22.536: debug : virCgroupDetect:230 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 09:53:22.536: debug : virCgroupDetect:230 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 09:53:22.536: debug : virCgroupDetect:230 : Detected mount/mapping 3:memory at /cgroup/memory in 09:53:22.536: debug : virCgroupDetect:230 : Detected mount/mapping 4:devices at /cgroup/devices in 09:53:22.536: debug : virCgroupDetect:230 : Detected mount/mapping 5:freezer at /cgroup/freezer in 09:53:22.536: debug : virCgroupMakeGroup:451 : Make group /libvirt/qemu/vmtest3 09:53:22.536: debug : virCgroupMakeGroup:463 : Make controller /cgroup/cpu/libvirt/qemu/vmtest3/ 09:53:22.536: debug : virCgroupMakeGroup:463 : Make controller /cgroup/cpuacct/libvirt/qemu/vmtest3/ 09:53:22.536: debug : virCgroupMakeGroup:463 : Make controller /cgroup/cpuset/libvirt/qemu/vmtest3/ 09:53:22.536: debug : virCgroupMakeGroup:463 : Make controller /cgroup/memory/libvirt/qemu/vmtest3/ 09:53:22.536: debug : virCgroupMakeGroup:463 : Make controller /cgroup/devices/libvirt/qemu/vmtest3/ 09:53:22.536: debug : virCgroupMakeGroup:463 : Make controller /cgroup/freezer/libvirt/qemu/vmtest3/ 09:53:22.536: debug : virCgroupSetValueStr:275 : Set value '/cgroup/cpu/libvirt/qemu/vmtest3/tasks' to '7312' 09:53:22.545: debug : virCgroupSetValueStr:275 : Set value '/cgroup/cpuacct/libvirt/qemu/vmtest3/tasks' to '7312' 09:53:22.554: debug : virCgroupSetValueStr:275 : Set value '/cgroup/cpuset/libvirt/qemu/vmtest3/tasks' to '7312' 09:53:22.562: debug : virCgroupSetValueStr:275 : Set value '/cgroup/memory/libvirt/qemu/vmtest3/tasks' to '7312' 09:53:22.569: debug : virCgroupSetValueStr:275 : Set value '/cgroup/devices/libvirt/qemu/vmtest3/tasks' to '7312' 09:53:22.577: debug : virCgroupSetValueStr:275 : Set value '/cgroup/freezer/libvirt/qemu/vmtest3/tasks' to '7312' 09:53:22.585: debug : qemudInitCpuAffinity:2618 : Setting CPU affinity 09:53:22.586: debug : qemuSecurityDACSetProcessLabel:547 : Dropping privileges of VM to 107:107 char device redirected to /dev/pts/2