From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Subject: Re: [PATCH, v10 3/3] cgroups: introduce timer slack controller
Date: Mon, 17 Oct 2011 18:33:59 +0200
Message-ID: <1318869239.4172.64.camel@twins>
References: <1318837019.6594.29.camel@twins>
	 <alpine.LFD.2.02.1110171119580.3240@ionos>
	 <20111017124647.GA12838@srcf.ucam.org> <1318856786.4172.22.camel@twins>
	 <20111017141147.GA14581@srcf.ucam.org> <1318861707.4172.32.camel@twins>
	 <20111017144013.GA15447@srcf.ucam.org> <1318862969.4172.45.camel@twins>
	 <20111017145952.GB15769@srcf.ucam.org> <1318864260.4172.54.camel@twins>
	 <20111017151920.GA16664@srcf.ucam.org> <1318864870.4172.61.camel@twins>
	 <20111017164839.3887ee3e@lxorguk.ukuu.org.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8BIT
Return-path: <linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
In-Reply-To: <20111017164839.3887ee3e-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
To: Alan Cox <alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
Cc: Matthew Garrett <mjg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>, Arjan van de Ven <arjan-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>, Lennart Poettering <mzxreary-uLTowLwuiw4b1SvskN2V4Q@public.gmane.org>, Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, "Kirill A. Shutemov" <kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>, Paul Menage <menage-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Li Zefan <lizf-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, jacob.jun.pan-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Kay Sievers <kay.sievers-tD+1rO4QERM@public.gmane.org>, harald-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, david-o55+BOBDEFg@public.gmane.org, greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org
List-Id: linux-api@vger.kernel.org

On Mon, 2011-10-17 at 16:48 +0100, Alan Cox wrote:
> > Hard enforcement is very much better than papering over because it makes
> > the individual developer instantly aware that he's got a problem.
> 
> Not always
> 
> If you do weird container crap with timers than app authors will simply
> point out that the weird container crap is buggy as it works properly in
> a normal environment.

Oh agreed. I never said the hard enforcement would/should rely on
container crap. I'm very much in favour of a machine that's fully
functional with a CGROUP=n kernel, thank you very much.

Sadly a number of (userspace) wankers (some included on this thread)
seem hell bent on making that impossible.