Hi Ben,

Finally finding a moment to actually look at these patches. Sorry it's
been a while. Can you send the patches inline rather than as
attachments in future?

Reviewed-by: Paul Menage <menage@google.com>

This patch looks fine, although I think that freezer_can_attach_task()
could be simplified to:

static int freezer_can_attach_task(struct cgroup *cgrp, struct task_struct *tsk)
{
  if (__cgroup_freezing_or_frozen(tsk))
    return -EBUSY;
  return 0;
}

since we guarantee that rcu_read_lock() is held across this call.

There appears to be a tiny bit of rot in kernel/cpu.c (due to the
addition of the exit() callback) and memcontrol.c (due to some changes
at the start of mem_cgroup_move_task()) but neither impact actual
code.

I think that before actually pushing to mainline, we'll need to sort
out the cpuset mempolicy yielding issue, since that could be a
user-visible API change.


Paul