title: LXC - Cgroup memory controller: missing
body: <p>I'm trying install LXC (0.7.4.1) on my Debian 6 but when I run the lxc-checkconfig I get "Cgroup memory controller: missing"</p>
  
  <pre><code>root@lxcsrv01:~# lxc-checkconfig
  Kernel config /proc/config.gz not found, looking in other places...
  Found kernel config file /boot/config-2.6.32-5-686
  --- Namespaces ---
  Namespaces: enabled
  Utsname namespace: enabled
  Ipc namespace: enabled
  Pid namespace: enabled
  User namespace: enabled
  Network namespace: enabled
  Multiple /dev/pts instances: enabled
  
  --- Control groups ---
  Cgroup: enabled
  Cgroup namespace: enabled
  Cgroup device: enabled
  Cgroup sched: enabled
  Cgroup cpu account: enabled
  Cgroup memory controller: missing
  Cgroup cpuset: enabled
  
  --- Misc ---
  Veth pair device: enabled
  Macvlan: enabled
  Vlan: enabled
  File capabilities: enabled
  enabled
  
  Note : Before booting a new kernel, you can check its configuration
  usage : CONFIG=/path/to/config /usr/bin/lxc-checkconfig
  </code></pre>
  
  <p>According google search I need to recompile my kernel but I don't know how.
  Someone can explain me how to do this?</p>
  
  <p>Best regards</p>