From: Eric Dumazet <eric.dumazet@gmail.com>
To: Peter Hurley <peter@hurleysoftware.com>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>,
Francois Romieu <romieu@fr.zoreil.com>,
Eric Dumazet <edumazet@google.com>,
David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Greg KH <gregkh@linuxfoundation.org>,
dmaengine@vger.kernel.org,
John Ogness <john.ogness@linutronix.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: Softirq priority inversion from "softirq: reduce latencies"
Date: Mon, 29 Feb 2016 08:24:23 -0800 [thread overview]
Message-ID: <1456763063.648.78.camel@edumazet-ThinkPad-T530> (raw)
In-Reply-To: <56D46AB4.6060805@hurleysoftware.com>
On lun., 2016-02-29 at 07:58 -0800, Peter Hurley wrote:
> All that's happened is the first loop of NET_RX softirq has woken a
> process; that is sufficient to abort softirq and defer it for ksoftirqd.
>
> That's why I'm saying this is a priority inversion, and one that
> will happen a lot.
Sure. This will happen every time ksoftirqd is launched.
Get rid of ksoftirqd or renice it so that you can easily be killed by
softirq storm.
next prev parent reply other threads:[~2016-02-29 16:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-27 18:19 Softirq priority inversion from "softirq: reduce latencies" Peter Hurley
2016-02-27 20:13 ` Eric Dumazet
2016-02-27 20:29 ` Peter Hurley
2016-02-27 23:04 ` David Miller
2016-02-27 23:33 ` Peter Hurley
2016-02-28 1:59 ` Eric Dumazet
2016-02-28 2:10 ` Peter Hurley
2016-02-28 2:17 ` Eric Dumazet
2016-02-28 4:46 ` David Miller
2016-02-28 5:55 ` Mike Galbraith
2016-02-28 17:01 ` Francois Romieu
2016-02-29 4:58 ` Mike Galbraith
2016-02-29 15:03 ` Peter Hurley
2016-02-29 15:19 ` Eric Dumazet
2016-02-29 15:54 ` Peter Hurley
2016-02-29 16:21 ` Eric Dumazet
2016-02-29 18:05 ` Peter Hurley
2016-02-29 18:24 ` Eric Dumazet
2016-02-29 18:53 ` Peter Hurley
2016-02-29 19:14 ` Thomas Gleixner
2016-02-29 20:24 ` David Miller
2016-02-29 23:04 ` Peter Hurley
2016-02-29 15:27 ` Eric Dumazet
2016-02-29 19:13 ` Peter Hurley
2016-02-29 19:43 ` Eric Dumazet
2016-02-29 15:40 ` Mike Galbraith
2016-02-29 15:58 ` Peter Hurley
2016-02-29 16:24 ` Eric Dumazet [this message]
2016-02-29 17:16 ` David Miller
2016-03-07 15:31 ` Sebastian Andrzej Siewior
2016-03-07 17:06 ` Mike Galbraith
2016-03-07 15:48 ` Sebastian Andrzej Siewior
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