Hi all I have CentOS Linux release 7.0.1406, libvirt 1.2.7 installed. Just after create and start inside LXC container present cgroups. Example for memory: [root@ce7-t1 /]# ls -la /sys/fs/cgroup/memory/ total 0 drwxr-xr-x 2 root root 0 Sep 15 17:14 . drwxr-xr-x 12 root root 280 Sep 15 17:14 .. -rw-r--r-- 1 root root 0 Sep 15 17:14 cgroup.clone_children --w--w--w- 1 root root 0 Sep 15 17:14 cgroup.event_control -rw-r--r-- 1 root root 0 Sep 15 17:15 cgroup.procs -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.failcnt --w------- 1 root root 0 Sep 15 17:14 memory.force_empty -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.failcnt -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.limit_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.max_usage_in_bytes -r--r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.slabinfo -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.tcp.failcnt -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.tcp.limit_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.tcp.max_usage_in_bytes -r--r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.tcp.usage_in_bytes -r--r--r-- 1 root root 0 Sep 15 17:14 memory.kmem.usage_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.limit_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.max_usage_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.memsw.failcnt -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.memsw.limit_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.memsw.max_usage_in_bytes -r--r--r-- 1 root root 0 Sep 15 17:14 memory.memsw.usage_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.move_charge_at_immigrate -r--r--r-- 1 root root 0 Sep 15 17:14 memory.numa_stat -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.oom_control ---------- 1 root root 0 Sep 15 17:14 memory.pressure_level -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.soft_limit_in_bytes -r--r--r-- 1 root root 0 Sep 15 17:14 memory.stat -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.swappiness -r--r--r-- 1 root root 0 Sep 15 17:14 memory.usage_in_bytes -rw-r--r-- 1 root root 0 Sep 15 17:14 memory.use_hierarchy -rw-r--r-- 1 root root 0 Sep 15 17:14 notify_on_release -rw-r--r-- 1 root root 0 Sep 15 17:14 tasks Command "free" inside LXC showed almost normal values: [root@ce7-t1 /]# free total used free shared buffers cached Mem: 1048576 32972 1015604 4473848 0 -4445364 -/+ buffers/cache: 4478336 -3429760 Swap: 1048576 0 1048576 (some problem with negative values) After unpredictable time passed (1-5 day ?), cgroups inside LXC magicaly removed. "free" in such containers show 2^53-1 as maximum values: [root@puppet01 /]# free total used free shared buffers cached Mem: 9007199254740991 591180 9007199254149811 0 0 267924 -/+ buffers/cache: 323256 9007199254417735 Swap: 0 0 0 And no more any cgroups presented at least in memory category: [root@puppet01 /]# ls -la /sys/fs/cgroup/memory/ total 0 b.r. Maxim Kozin