ubuntu and cgroups

[Kevin Wilson]

Hello,
I found that the package:
cgroup-lite
was the reason.
I removed it, rebooted, and then mount showed no cgroups.

However, after some time, the package was installed without me requesting
for it, by probably some ubunt package daemon.
Any idea how can prevent automatic reinstallation of this package ?


rgs
Kevin


On Fri, Apr 12, 2013 at 4:15 PM, Kevin Wilson <wkevils at gmail.com> wrote:
> Hello,
> I am using Ubuntu 12.10 (with Linux 3.5.0-17-generic kernel)
> There is no special installation (like containers/openvz) on this
> machine and no kernel patches.
>
> After boot, I see:
>
>  mount | grep cgroup
> gives:
> cgroup on /sys/fs/cgroup type tmpfs (rw,relatime,mode=755)
> cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset)
> cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu)
> cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct)
> cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
> cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices)
> cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
> cgroup on /sys/fs/cgroup/blkio type cgroup (rw,relatime,blkio)
> cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,relatime,perf_event)
>
> more info:
> uname -a
> Linux amd 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012
> x86_64 x86_64 x86_64 GNU/Linux
>
> And for example, there are 153 pid entries, as  getting when running:
> ls  /sys/fs/cgroup/cpuset/tasks | wc -l
>
> Question: which service/process mount this cgroups ? (there is no
> systemd in Ubuntu). For which purpose are they mounted ?
>
>
> Best,
> Kevin