- Use memory controller cgroup (CGROUP_MEM_RES_CTLR) notifications from
the kernel side, plus userland "manager" that would kill applications.
The main downside of this approach is that mem_cg needs 20 bytes per
page (on a 32 bit machine). So on a 32 bit machine with 4K pages
that's approx. 0.5% of RAM, or, in other words, 5MB on a 1GB machine.
0.5% doesn't sound too bad, but 5MB does, quite a little bit. So,
mem_cg feels like an overkill for this simple task (see the driver at
the very bottom).