linux-kernel - Re: [PATCH v13 4/5] cgroup: allow a cgroup subsystem to reject a fork

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Message-ID: <CAOS58YM9nUYGP_f3_CE4EoaFGJ=aB3EJC43xrJwc_iymLf+rXQ@mail.gmail.com>
Date:	Tue, 9 Jun 2015 16:23:07 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Aleksa Sarai <cyphar@...har.com>
Cc:	Li Zefan <lizefan@...wei.com>, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Richard Weinberger <richard@....at>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: Re: [PATCH v13 4/5] cgroup: allow a cgroup subsystem to reject a fork

Hello,

On Tue, Jun 9, 2015 at 4:20 PM, Aleksa Sarai <cyphar@...har.com> wrote:
> CGROUP_CANFORK_{START,END,COUNT} aren't used to restrict the
> iteration. They're used for restricting the size of the @ss_priv
> array. If you want, I can use CANFORK_{START,END} to restrict the
> iteration -- I just prefer using the for_each_subsys_which API for
> iterating over active cgroups. :/

Ah, I see.  Hmm... yeah, let's keep the code for now, but I think it'd
be cheaper / cleaner to use those macro tags to restrict iteration and
drop all the masks in the future.

Thanks.

-- 
tejun
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