From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: Soft-Lockup/Race in networking in 2.6.31-rc1+195 (possibly caused by netem) Date: Thu, 2 Jul 2009 11:43:46 +0000 Message-ID: <20090702114346.GB7402@ff.dom.local> References: <4A4A9DD6.8060800@anarazel.de> <4A4BAD5F.7050908@gmail.com> <4A4BD384.3090407@anarazel.de> <4A4C0144.5070203@anarazel.de> <20090702093031.GC4954@ff.dom.local> <20090702101207.GA7056@ff.dom.local> <4A4C95FC.7040305@anarazel.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: LKML , netdev@vger.kernel.org, Stephen Hemminger , Patrick McHardy To: Andres Freund Return-path: Content-Disposition: inline In-Reply-To: <4A4C95FC.7040305@anarazel.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Thu, Jul 02, 2009 at 01:11:56PM +0200, Andres Freund wrote: > On 07/02/2009 12:12 PM, Jarek Poplawski wrote: >> On Thu, Jul 02, 2009 at 09:30:31AM +0000, Jarek Poplawski wrote: >>> On Thu, Jul 02, 2009 at 02:37:24AM +0200, Andres Freund wrote: >>> ... >>>> So I tried - and I did not catch any lockdep output before the crash. >>>> Unfortunately I do not have another machine on the same local network to >>>> catch any messages after the crash... So I could be missing some warning >>>> (I did synchronous logging though). >>>> Will check with netconsole tomorrow. >>> >>> Could you try if this patch changes anything? >> >> ...and maybe CONFIG_PACKET_MMAP turned off. > Ok. Removed the skb_orphan and turned of CONFIG_PACKET_MMAP. Seemingly > the same game. > I now had another computer to catch the netconsole output. Still no > lockdep warnings. > > Unfortunately the other computer was a windows machine with its strange > terminal, so long lines are wrapped at 80cols, but that shouldn't be too > bad. It's very nice ;-) Alas we can see here only one side, so there is still some searching needed. I hope I'll be able to reproduce this later. Thanks for your work Andres, Jarek P.