Cgroups, limit memory per user

Question

Is it possible to limit memory usage per user not per group?

This is my config ...

/etc/cgconfig.conf

mount {
    cpu     = /cgroup/cpu_and_mem;
    cpuacct = /cgroup/cpu_and_mem;
    memory  = /cgroup/cpu_and_mem;
}
group small {
        cpu {
                cpu.shares="100";
        }
        cpuacct {
                cpuacct.usage="0";
        }
        memory {
                memory.limit_in_bytes="200M";
                memory.memsw.limit_in_bytes="200M";
        }
}

/etc/cgrules.conf

@guests      cpu,cpuacct,memory      small
user1        cpu,cpuacct,memory      small
user2        cpu,cpuacct,memory      small

Right now i see only one option to create group small1 and link user1 to that group, then user2 to small2 and so on, like this:

/etc/cgconfig.conf

group small1 {
        cpu {
                cpu.shares="100";
...
group small2 {
        cpu {
                cpu.shares="100";
...

/etc/cgrules.conf

user1        cpu,cpuacct,memory      small1
user2        cpu,cpuacct,memory      small2

Does anybody know better way of doing this?

Solution

Is it possible to limit memory usage per user not per group?

It is possible with templates

Rules specified in /etc/cgrules.conf can be linked to templates configured either in the /etc/cgconfig.conf file or in configuration files stored in the /etc/cgconfig.d/ directory, allowing for flexible cgroup assignment and creation.