From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH v2 1/2] cgroups: allow a cgroup subsystem to reject a fork
Date: Tue, 10 Mar 2015 08:47:01 -0400
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To: Aleksa Sarai <cyphar-gVpy/LI/lHzQT0dZR+AlfA@public.gmane.org>
Cc: lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, richard-/L3Ra7n9ekc@public.gmane.org, =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

Hello, Aleksa.

On Tue, Mar 10, 2015 at 07:19:06PM +1100, Aleksa Sarai wrote:
> I'm not sure how to check for equality between two `css_set`s (or just two
> `css`s). Is there a function to do so? Also, I'm not sure if there's a nice way

You can compare the css pointers for equality.

> of doing a charge that stops if you hit a certain `css` (unless we start
> passing `css_set`s to the fork/exit callbacks -- and then we can uncharge the
> old css_set and charge the new one).

We'll have to pass the pointer from can_fork side to post_fork.  I'm
not sure how that should be done either.

Thanks.

-- 
tejun