On Tue, 2012-02-28 at 16:35 -0500, Vivek Goyal wrote:

For
cpu controller, it is priority at the group level no fixed minimum/maximum
% shares. And that's a limitation of treating task and group at same level.

Depends on what you mean by min/max %, you can do it on the group level
by using bandwidth caps (for max) or inverted (max on everybody else,
for min).