Re: [PATCH v6 2/3] cgroups: allow a cgroup subsystem to reject a fork

[Tejun Heo]

On Fri, Mar 27, 2015 at 08:41:05AM +1100, Aleksa Sarai wrote:
> > You can't pin css_set from inside cgroup callbacks.  It's a construct
> > which in general shouldn't be accessible outside cgroup core.
> 
> Yeah, sorry I meant css (you aren't pinning, but you're still saving under RCU
> and dealing with the association-related stuff inside post_fork).

How would that work without pinning?  What'd keep the css from going
away between pre and post?

Thanks.

-- 
tejun
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