[Lxc-users] Bug with cgroup devices access rights!?

[sfrazt]

I use up-to-date aptosid kernel (3.0.4) and tested the cgroup device access
rights with rtc.
test:
- start with no rights for c 254 0 (rtc).
- start container, terminal and become root (i deleted all rtc-files in
  container before)
- mknod -600 rtc0 c 254 0  -> not permitted
- on host: echo 'c 254:0 m' > /cgroup/a/devices.allow
- mknod works now
- in container: hwclock -r (read time) doesn't work
- on host: echo 'c 254:0 r' > /cgroup/a/devices.allow
- hwclock -r does work now

- cat /cgroup/a/devices.list shows that rtc has only read right

- in container; hwclock --set --date"9/22/96" does work!
- host hwclock -r shows now the new date!

i'm not sure if it is a bug or strange behaviour. Does it happen  only with
aptosid kernel or is it a general kernel bug?