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 17:16:53 -0500 Message-ID: <1273875413.15067.1348.camel@calx> References: <20100514134544.GA26674@gretchen.aei.mpg.de> <4BED79EB.1000204@kernel.org> <1273858653.15067.1335.camel@calx> <4BEDCA89.7000707@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]:47412 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751968Ab0ENWQ4 (ORCPT ); Fri, 14 May 2010 18:16:56 -0400 In-Reply-To: <4BEDCA89.7000707@kernel.org> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, 2010-05-15 at 00:11 +0200, Tejun Heo wrote: > Hello, > > On 05/14/2010 07:37 PM, Matt Mackall wrote: > >> 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. > > Yeap, sure, it would be effective but I kind of want to leave > bisection as the last resort. Bisection is a somewhat painful process > especially when the machine isn't right next to you and someone who > has overall knowledge can often identify the problem much easier with > appropriate debugging info. Well nothing jumps to mind in the netpoll/netconsole code and I haven't heard any similar reports. My guess is it's something obscure, so I think the sooner you start bisecting... Even one or two tests will get us a lot closer to figuring out what changed in the last 1.5 years. -- Mathematics is the supreme nostalgia of our time.