[Devel] Re: [PATCH v5 04/14] kmem accounting basic infrastructure

[Tejun Heo]

Hey, Glauber.

On Thu, Oct 18, 2012 at 09:01:23PM +0400, Glauber Costa wrote:
> That is the offensive part. But it is also how things are done in memcg
> right now, and there is nothing fundamentally different in this one.
> Whatever lands in the remaining offenders, can land in here.

I think the problem here is that we don't have "you're committing to
creation of a new cgroup" callback and thus subsystem can't
synchronize locally against cgroup creation.  For task migration
->attach() does that but cgroup creation may fail after ->create()
succeeded so that doesn't work.

We'll probably need to add ->post_create() which is invoked after
creation is complete.  Li?

Thanks.

-- 
tejun