linux-kernel - Re: [RFC PATCH 11/12] cgroups: Allow subsystems to cancel a fork

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Message-Id: <20110915140941.6b278dfb.akpm@google.com>
Date:	Thu, 15 Sep 2011 14:09:41 -0700
From:	Andrew Morton <akpm@...gle.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Paul Menage <paul@...lmenage.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Aditya Kali <adityakali@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Kay Sievers <kay.sievers@...y.org>,
	Tim Hockin <thockin@...kin.org>, Tejun Heo <tj@...nel.org>
Subject: Re: [RFC PATCH 11/12] cgroups: Allow subsystems to cancel a fork

On Tue,  6 Sep 2011 02:13:05 +0200
Frederic Weisbecker <fweisbec@...il.com> wrote:

> Let the subsystem's fork callback return an error value so
> that they can cancel a fork. This is going to be used by
> the task counter subsystem to implement the limit.

This breaks the build quite gruesomely with CONFIG_CGROUPS=n.  I looked
at doing a quick fix but that would just have piled ugly on ugly.

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