Hi, Sam. Libvirt may not have that configuration. I think you can use "cgconfig" instead of it. Setting as follows, in my environment was successful. 1) edit /etc/cgconfig.conf # cpuset.cpus/mems is mandatory values. # Please set suitable values according to your environment. ---------- group libvirt { cpuset { cpuset.cpus = 0; cpuset.mems = 0; } } group libvirt/lxc { cpuset { cpuset.cpus = 0; cpuset.mems = 0; } devices { devices.allow = "c 10:200 rwm"; } } mount { cpuset = /cgroup/cpuset; cpu = /cgroup/cpu; cpuacct = /cgroup/cpuacct; memory = /cgroup/memory; devices = /cgroup/devices; freezer = /cgroup/freezer; net_cls = /cgroup/net_cls; blkio = /cgroup/blkio; } ---------- 2) restart cgconfig and libvirtd. # Order is "libvirtd stop->cgconfig restart->libvirtd start" 3) start lxc container. Result in my environment(CentOS6.2 x86_64+libvirt 0.9.8) is # virsh -c lxc:/// start lxc_container_1 Domain lxc_container_1 started # cat /cgroup/devices/libvirt/lxc/lxc_container_1/devices.list c 10:200 rwm <-- :-) c 1:3 rwm c 1:5 rwm c 1:7 rwm c 1:8 rwm c 1:9 rwm c 5:0 rwm c 5:2 rwm c 136:* rwm Regards, Mitsuru Kanabuchi > -----Original Message----- > From: libvirt-users-bounces(a)redhat.com [mailto:libvirt-users-bounces@redhat.com] On Behalf Of Samuel Hassine > Sent: Wednesday, January 25, 2012 8:28 PM > To: libvirt-users(a)redhat.com > Subject: [libvirt-users] How to change libvirt / cgroup interaction? > > Hi there, > > Do you know if there is a way to modify how libvirt interacts with the cgroup? > > Because, I successfully add the /dev/net/tun support in my LXC container by doing: > > echo c 10:200 rwm >> /cgroup/libvirt/lxc/instance-00000005/devices.allow > > But when I restart the instance/LXC container, this option has gone. > > > Thanks for your answers. > > Best regards. > Sam > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users