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I'm trying to setup Cgroups for a non-root user glassfish.

System setup:

  • CentOS 7.2.1511
  • Kernel 3.10.0-327.el7.x86_64
  • Cgroup mounted at /sys/fs/cgroup

It should be possible to create a Cgroup for non-root user by issuing these commands:

  1. For CPU subsystem:

    $ sudo mkdir /sys/fs/cgroup/cpu/${USER}
    $ sudo chown -R ${USER} /sys/fs/cgroup/cpu/${USER}
    
  2. For Devices subsystem:

    $ sudo mkdir /sys/fs/cgroup/devices/${USER}
    $ sudo chown -R ${USER} /sys/fs/cgroup/devices/${USER}
    

This works for the CPU subsystem. Since I am able to write to control files as glassfish, such as cpu.cfs_period_us like below

    echo 43434 > cpu.cfs_period_us

But writing to the Devices subsystem such as

    echo 'a *:* rwm' > devices.deny

Results in the following error

    bash: echo: write error: Operation not permitted

CPU subsystem permissions

Device subsystem permissions

Any help would be deeply appreciated, I've been stuck with this for so long and it just doesn't make sense to me.

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