From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932426Ab1IAPOo (ORCPT ); Thu, 1 Sep 2011 11:14:44 -0400 Received: from lennier.cc.vt.edu ([198.82.162.213]:50385 "EHLO lennier.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932129Ab1IAPOm (ORCPT ); Thu, 1 Sep 2011 11:14:42 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3-dev To: "David S. Miller" cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: linux-next 20110831 - netconsole startup issue From: Valdis.Kletnieks@vt.edu Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 01 Sep 2011 11:14:39 -0400 Message-ID: <5187.1314890079@turing-police.cc.vt.edu> X-Mirapoint-Received-SPF: 198.82.161.152 auth3.smtp.vt.edu Valdis.Kletnieks@vt.edu 2 pass X-Junkmail-Status: score=10/50, host=dagger.cc.vt.edu X-Junkmail-Signature-Raw: score=unknown, refid=str=0001.0A02020B.4E5FA160.008F,ss=1,fgs=0, ip=0.0.0.0, so=2010-07-22 22:03:31, dmn=2009-09-10 00:05:08, mode=single engine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Chasing a kernel panic in linux-next, and hit an unrelated issue starting up netconsole that's bogging me down. On linux-next-20110823, I had this: [ 7.078099] e1000e: Intel(R) PRO/1000 Network Driver - 1.5.1-k [ 7.078102] e1000e: Copyright(c) 1999 - 2011 Intel Corporation. [ 7.078158] e1000e 0000:00:19.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 [ 7.078171] e1000e 0000:00:19.0: setting latency timer to 64 [ 7.078354] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X [ 7.269439] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:21:70:de:b6:fd [ 7.269443] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection [ 7.269469] e1000e 0000:00:19.0: eth0: MAC: 7, PHY: 8, PBA No: 4003FF-0FF [ 7.293569] netconsole: network logging started Bring up the ethernet, then the console. Works great, However, on -20110831, I get this: [ 0.983149] netconsole: local port 9909 [ 0.983254] netconsole: local IP 128.173.14.107 [ 0.983358] netconsole: interface 'eth0' [ 0.983461] netconsole: remote port 9909 [ 0.983564] netconsole: remote IP 128.173.14.108 [ 0.983668] netconsole: remote ethernet address 00:14:22:5a:79:d3 [ 0.983776] netconsole: eth0 doesn't exist, aborting. [ 0.983897] netconsole: cleaning up [ 1.176429] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:21:70:de:b6:fd [ 1.176557] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection [ 1.176688] e1000e 0000:00:19.0: eth0: MAC: 7, PHY: 8, PBA No: 4003FF-0FF Whoops. No netconsole. Even more annoying (and quite possibly related), the kernel is built with CONFIG_NETCONSOLE_DYNAMIC. On -20110823, I have a /sys/kernel/config/netconsole directory and can use it to configure netconsole on the fly. However, on -20110831, /sys/kernel/config is empty - no netconsole subdirectory. So I couldn't even boot to single-user, configure netconsole, and then continue to multiuser and capture the crash.