From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Mackall Subject: Re: loosing IPMI-card by loading netconsole Date: Fri, 14 May 2010 12:37:33 -0500 Message-ID: <1273858653.15067.1335.camel@calx> References: <20100514134544.GA26674@gretchen.aei.mpg.de> <4BED79EB.1000204@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: "Ronciak, John" , Henning Fehrmann , "Kirsher, Jeffrey T" , "Brandeburg, Jesse" , "Allan, Bruce W" , "Waskiewicz Jr, Peter P" , "netdev@vger.kernel.org" , Carsten Aulbert To: Tejun Heo Return-path: Received: from waste.org ([173.11.57.241]:44251 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756760Ab0ENRhh (ORCPT ); Fri, 14 May 2010 13:37:37 -0400 In-Reply-To: <4BED79EB.1000204@kernel.org> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, 2010-05-14 at 18:27 +0200, Tejun Heo wrote: > Hello, John. > > As Henning seems offline, I'll try to fill in. > > On 05/14/2010 04:51 PM, Ronciak, John wrote: > > Sorry to hear about the problem you are having Henning. What do you > > mean when you say "it disappears"? > > It stops responding to IPMI requests. > > > Can both eth0 and eth1 ping (or be pinged)? Do all the networking > > devices still show up in the system when you do an 'lspci'? > > Yeah, everything other than IPMI works just fine. > > > What happens if you down and then up the interface you are having > > problems with? Does 'rmmod' do the same thing as your removal > > method? > > Haven't tried these but well I think rmmoding should achieve about the > same thing. > > > Is there anything in the system logs saying anything about the > > interfaces? > > Nope. > > > We have not had reports of this so this is a bit unusual. Please let us know. > > > > Does this happen on other systems as well or just one particular system? > > Yeah, it happens on at least several hundred machines, so not an > isolated hardware issue at all. > > To sum up. > > On 2.6.27.39, netconsole + IPMI works fine. On 2.6.32.7, as soon as > netconsole is loaded, IPMI stops working. Unloading netconsole > doesn't revive IPMI but detaching the driver from the controller does. > In both cases, usual networking works fine. Looks like a job for bisect. -- Mathematics is the supreme nostalgia of our time.