1===========================
2Namespaces research control
3===========================
4
5There are a lot of kinds of objects in the kernel that don't have
6individual limits or that have limits that are ineffective when a set
7of processes is allowed to switch user ids.  With user namespaces
8enabled in a kernel for people who don't trust their users or their
9users programs to play nice this problems becomes more acute.
10
11Therefore it is recommended that memory control groups be enabled in
12kernels that enable user namespaces, and it is further recommended
13that userspace configure memory control groups to limit how much
14memory user's they don't trust to play nice can use.
15
16Memory control groups can be configured by installing the libcgroup
17package present on most distros editing /etc/cgrules.conf,
18/etc/cgconfig.conf and setting up libpam-cgroup.
19