From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Clark Williams <williams@redhat.com>,
John Kacur <jkacur@redhat.com>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Juri Lelli <juri.lelli@gmail.com>
Subject: Re: [BUG] Corrupted SCHED_DEADLINE bandwidth with cpusets
Date: Wed, 3 Feb 2016 13:57:55 -0500 [thread overview]
Message-ID: <20160203135755.07f59bc2@gandalf.local.home> (raw)
In-Reply-To: <20160203135550.5f95ecb2@gandalf.local.home>
On Wed, 3 Feb 2016 13:55:50 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:
> # grep dl /proc/sched_debug
> dl_rq[0]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[1]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[2]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[3]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[4]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[5]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[6]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
> dl_rq[7]:
> .dl_nr_running : 0
> .dl_bw->bw : 996147
> .dl_bw->total_bw : -104857
>
> They all went negative!
>
> Not good, but we can recover...
Even though we can recover, I'm betting we can easily overcommit
deadline tasks here. It probably wouldn't be too hard to come up with a
test case that does so.
-- Steve
next prev parent reply other threads:[~2016-02-03 18:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 18:55 Steven Rostedt
2016-02-03 18:57 ` Steven Rostedt [this message]
2016-02-04 9:54 ` Juri Lelli
2016-02-04 12:04 ` Juri Lelli
2016-02-04 12:27 ` Juri Lelli
2016-02-04 16:30 ` Juri Lelli
2016-02-04 17:31 ` Steven Rostedt
2016-02-04 18:32 ` Juri Lelli
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