On Sat, 2010-12-25 at 20:59 +0000, Paul Menage wrote: > While this patch is likely fine for solving the problem, it does add > extra work into the task exit path. > > Could you instead just use the pre_destroy callback to return -EBUSY > if there are still any tasks on the cfs_rq? That way there'd only be a > penalty on cgroup destruction, which is a much rarer operation. No, that's broken! That would mean userspace gets the cgroup-empty notification thing and then encounters -EBUSY, which then forces it to go poll the state, rendering the whole notification thing pointless. -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
