I have Debian 7 box and little issue:

mkdir /cgroups/test
echo 500 > /cgroups/test/cpu.shares
echo 3167 > /cgroups/test/tasks
bash: echo: write error: No space left on device

How can I fix it?

In fstab:

cgroup /cgroups cgroup defaults 0 0

I have installed: cgroup-bin, libcgroup1, libpam-cgroup

  • Provide the mount options for your cgroups mount. Mar 3, 2014 at 18:59
  • I'm not sure if this is a disk issue. Think this is more cgroup related. I might have some time to look into this tonight ... Mar 3, 2014 at 19:03
  • cgroups is virtual - no need extra hdd space, but i have free space
    – Guest
    Mar 3, 2014 at 19:11

1 Answer 1


I have been able to reproduce and solve the issue doing :

/bin/echo 0 >/cgroups/test/cpuset.mems
/bin/echo 0 >/cgroups/test/cpuset.cpus

Seems that CPUs and Memory Nodes' list for the cpuset were created with empty values when the test folder was created.

Hope it will work for you also.

  • Thanks U! It works! :) I can't add +1 vote to your post because I don't have required reputation.
    – Guest
    Mar 3, 2014 at 21:48
  • 1
    Hello! Has a bug report been filed for this? I didn't see one with a cursory search. This one needs to go upstream. bugzilla.kernel.org Thanks. At the very least, we should get a warning in the kernel logs. May 17, 2019 at 23:11

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