linux-kernel - Re: [PATCH][RT] netpoll: Always take poll

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Message-ID: <20160610124525.32cac2e0@gandalf.local.home>
Date:	Fri, 10 Jun 2016 12:45:25 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	alison@...oton-tech.com, LKML <linux-kernel@...r.kernel.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Clark Williams <williams@...hat.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH][RT] netpoll: Always take poll_lock when doing polling

On Fri, 10 Jun 2016 18:20:22 +0200
Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:

> > We actually triggered a starvation due to this. I was just seeing if
> > Alison hit the same issue we did in our tests.  
> 
> Okay. Didn't get this information from him. But this is only because
> the softirqs not running in ksoftirqd, right?

Right, I think we supplied this patch before we added the one that
would push repeated softirqs to ksoftirqd. We probably should see if
that patch alone fixes our issue.

-- Steve