From: Dave Jones <davej@redhat.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: NOHZ: local_softirq_pending 08
Date: Thu, 31 May 2012 10:04:32 -0400 [thread overview]
Message-ID: <20120531140432.GC1749@redhat.com> (raw)
In-Reply-To: <1338450985.2760.1270.camel@edumazet-glaptop>
On Thu, May 31, 2012 at 09:56:25AM +0200, Eric Dumazet wrote:
> On Thu, 2012-05-31 at 09:52 +0200, Thomas Gleixner wrote:
> > Dave,
> >
> > On Wed, 30 May 2012, Dave Jones wrote:
> >
> > > May 30 17:43:04 [ 1095.335659] NOHZ: local_softirq_pending 08
> > >
> > > According to git, you ratelimited this back in 2007 with the message
> > > "until we found the root cause of that problem."
> > >
> > > Is this an old problem that has returned ?
> >
> > Looks like.
> >
> > > Maybe interesting note: Both machines I see this on regularly are Atom cpus,
> > > and it's always '08'.
> >
> > So it goes idle with NET_RX softirq pending. That really should not
> > happen. I fear you need to fire up the tracer :)
>
> It might be a bug in the network driver, a race with NAPI completion.
>
> Dave, which net drivers run on these machines ?
r8169.
I got an email from someone else asking if I used Realtek drivers, which I thought
was an uncanny guess.
Dave
next prev parent reply other threads:[~2012-05-31 14:04 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-30 21:48 NOHZ: local_softirq_pending 08 Dave Jones
2012-05-31 7:52 ` Thomas Gleixner
2012-05-31 7:56 ` Eric Dumazet
2012-05-31 14:04 ` Dave Jones [this message]
2012-06-08 16:46 ` Nikos Chantziaras
2012-06-01 22:57 ` Francois Romieu
2012-06-02 20:58 ` Marc Dionne
2012-06-05 23:15 ` Francois Romieu
2012-06-06 1:46 ` Dave Jones
2012-06-06 5:42 ` Francois Romieu
2012-06-08 2:34 ` Dave Jones
2012-06-08 7:57 ` Thomas Gleixner
2012-06-08 14:23 ` Dave Jones
2012-06-08 14:51 ` Thomas Gleixner
2012-06-08 20:27 ` Francois Romieu
2012-06-08 20:41 ` Thomas Gleixner
2012-06-08 21:53 ` Francois Romieu
2012-06-08 22:33 ` Marc Dionne
2012-06-10 20:40 ` Dave Jones
2012-06-25 12:38 ` Johannes Stezenbach
2012-06-25 19:28 ` Francois Romieu
2012-06-25 19:52 ` Dave Jones
2012-06-08 8:32 ` Johannes Stezenbach
-- strict thread matches above, loose matches on Subject: below --
2009-10-11 9:52 Dave Young
2009-10-11 10:08 ` Johannes Berg
2009-10-11 10:17 ` Michael Buesch
2009-10-11 10:37 ` Johannes Berg
2009-10-11 10:38 ` David Miller
2009-10-11 10:55 ` Dave Young
2009-10-11 11:18 ` Tilman Schmidt
2009-10-11 11:40 ` Johannes Berg
2009-10-12 8:28 ` Tilman Schmidt
2009-10-12 10:32 ` David Miller
2009-10-12 11:25 ` Tilman Schmidt
2009-10-15 11:40 ` Jarek Poplawski
2009-10-15 17:53 ` Jarek Poplawski
2009-10-21 18:46 ` Tilman Schmidt
2009-10-22 23:37 ` Tilman Schmidt
2009-10-23 13:34 ` Johannes Berg
2009-10-23 14:27 ` Tilman Schmidt
2009-10-23 14:31 ` Johannes Berg
2009-10-23 16:33 ` Tilman Schmidt
2009-10-11 16:39 ` Joe Korty
2007-05-29 6:01 Rafał Bilski
2007-05-28 21:04 Rafał Bilski
2007-05-28 22:12 ` Anant Nitya
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