Hello, On Fedora 20, I try the following: 1) create a cgroup called "0" /sys/fs/cgroup/memory/0 run: echo "1" > /sys/fs/cgroup/memory/0/memory.oom_control bash: echo: write error: Invalid argument Why am I having this error ? According to the documentation: http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt: You can disable the OOM-killer by writing "1" to memory.oom_control file, as:754 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L754> 755 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L755> #echo 1 > memory.oom_control756 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L756> 757 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L757> This operation is only allowed to the top cgroup of a sub-hierarchy.758 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L758> If OOM-killer is disabled, tasks under cgroup will hang/sleep759 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L759> in memory cgroup's OOM-waitqueue when they request accountable memory.760 <http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt#L760> regards, Kevin