From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1753025AbcKHXmp (ORCPT <rfc822;w@1wt.eu>);
        Tue, 8 Nov 2016 18:42:45 -0500
Received: from resqmta-ch2-01v.sys.comcast.net ([69.252.207.33]:48270 "EHLO
        resqmta-ch2-01v.sys.comcast.net" rhost-flags-OK-OK-OK-OK)
        by vger.kernel.org with ESMTP id S1750832AbcKHXmm (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 8 Nov 2016 18:42:42 -0500
Date: Tue, 8 Nov 2016 17:42:38 -0600 (CST)
From: Christoph Lameter <cl@linux.com>
X-X-Sender: cl@east.gentwo.org
To: Steven Rostedt <rostedt@goodmis.org>
cc: Daniel Bristot de Oliveira <daniel@bristot.me>,
        Daniel Bristot de Oliveira <bristot@redhat.com>,
        Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
        linux-rt-users <linux-rt-users@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched/rt: RT_RUNTIME_GREED sched feature
In-Reply-To: <20161107151617.486b1b42@gandalf.local.home>
Message-ID: <alpine.DEB.2.20.1611081742180.22679@east.gentwo.org>
References: <fa5b1b55d8934c6a0e02e04a7ad6afdf4012c2e0.1478506194.git.bristot@redhat.com> <alpine.DEB.2.20.1611071054320.17809@east.gentwo.org> <20161107133207.4282de69@gandalf.local.home> <alpine.DEB.2.20.1611071328470.19249@east.gentwo.org>
 <20161107144738.4811a5dd@gandalf.local.home> <alpine.DEB.2.20.1611071353440.19543@east.gentwo.org> <20161107150003.66777b43@gandalf.local.home> <1e79f711-95f1-da2f-f572-1ac4329c8be7@bristot.me> <20161107151617.486b1b42@gandalf.local.home>
Content-Type: text/plain; charset=US-ASCII
X-CMAE-Envelope: MS4wfAk9t/mRqOLP3QUHtJ5gLEWlSZclaBtVeEqEH2gAu5OX+F008knT1hUqpkRJvlIn/zu7nsedapAmWO8jJuLPXpeKf0l9Njp7QsLoWU/WClKrjeFBtqWq
 5pZIi/0OcnlHENRlGRE5lNODSCCIqLsoYRHM17bWKCwjQvVmTkHqxszW3ggJ12pCx9sh/EhenHuof0GKuxYK6kYasFGCEPz8zEA2/8HTMaksF3GNcx0lp9yx
 rU4mkNhPeutrl0iEMpqnI2udigmSQM7JOHocSeD+gmYRzawDnSP+lRhrJVCPfhI5D5CstEbM+ipRZSRvDQyOmm6woRirNMY09/mtqF5lxqPQuX5J0cB2VLc2
 /wQ55XFJ
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, 7 Nov 2016, Steven Rostedt wrote:

> On Mon, 7 Nov 2016 21:06:50 +0100
> Daniel Bristot de Oliveira <daniel@bristot.me> wrote:
>
> > The throttling allowed the kworker to run, but once the kworker went to
> > sleep, the RT tasks started to work again. In the previous behavior,
> > the system would either go idle, or the kworker would starve because
> > the runtime become infinity for RR tasks.
>
> I'm confused? Are you saying that RR tasks don't get throttled in the
> current code? That sounds like a bug to me.

Good. Thats what I wanted to hear after all these justifications that the
system is just behaving as designed.