linux-kernel - Re: dvb usb issues since kernel 4.9

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Message-ID: <20180108214427.GT29822@worktop.programming.kicks-ass.net>
Date:   Mon, 8 Jan 2018 22:44:27 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jesper Dangaard Brouer <jbrouer@...hat.com>
Cc:     Josef Griebichler <griebichler.josef@....at>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Rik van Riel <riel@...hat.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Hannes Frederic Sowa <hannes@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        LMML <linux-media@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        torvalds@...ux-foundation.org
Subject: Re: dvb usb issues since kernel 4.9

On Mon, Jan 08, 2018 at 10:31:09PM +0100, Jesper Dangaard Brouer wrote:
> I did expected the issue to get worse, when you load the Pi with
> network traffic, as now the softirq time-budget have to be shared
> between networking and USB/DVB. Thus, I guess you are running TCP and
> USB/mpeg2ts on the same CPU (why when you have 4 CPUs?...)

Isn't networking also over USB on the Pi ?