Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755488AbaFPTF4 (ORCPT ); Mon, 16 Jun 2014 15:05:56 -0400 Received: from mail-ph.de-nserver.de ([85.158.179.214]:60898 "EHLO mail-ph.de-nserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753255AbaFPTFz (ORCPT ); Mon, 16 Jun 2014 15:05:55 -0400 X-Fcrdns: Yes References: <539EE86E.6030806@profihost.ag> <6B8712E6-8012-42C3-9D98-0EBD943F2894@profihost.ag> Mime-Version: 1.0 (1.0) In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: Cc: Stephen Hemminger , David Miller , "bridge@lists.linux-foundation.org" , Linux Netdev List , LKML X-Mailer: iPhone Mail (11D201) From: Stefan Priebe - Profihost AG Subject: Re: netconsole breaks netpoll on bridge Date: Mon, 16 Jun 2014 21:05:55 +0200 To: Cong Wang X-User-Auth: Auth by s.priebe@profihost.ag through 84.190.88.187 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Am 16.06.2014 um 20:51 schrieb Cong Wang : > > On Mon, Jun 16, 2014 at 11:41 AM, Stefan Priebe - Profihost AG > wrote: >> >>> Am 16.06.2014 um 20:05 schrieb Cong Wang : >>> >>> On Mon, Jun 16, 2014 at 5:51 AM, Stefan Priebe - Profihost AG >>> wrote: >>>> Hi, >>>> >>>> i'm using a vanilla 3.10.43 kernel and netconsole on top of a bridge. >>>> >>>> netconsole is used with vmbr0 (bridge) which is on top of bond0. >>>> >>>> If i want to add another bridge to vmbr0 is fails as long as netconsole >>>> is in use. >>>> >>>> # brctl addif vmbr0 fwpr2004p0 >>>> can't add fwpr2004p0 to bridge vmbr0: Unknown error 524 >>>> >>>> Kernel output: >>>> netpoll: (null): fwpr2004p0 doesn't support polling, aborting >>>> >>>> If i do rmmod netconsole - everything is working fine again. >>> >>> This is expected, you can't add an interface which doesn't support >>> netpoll to a bridge which is running netpoll. >> >> Thanks, so i can't use netconsole at a bridge used for vms? > > You can, but you need to make sure all the devices under > this bridge support netpoll. Not considering mac learning, > bridge just broadcasts all the packets to its ports, if one of them > doesn't support netpoll, how could it work? Ok i was trying to add a veth device so this is the problematic device. >>> You should stop netpoll before adding it. >> >> How to do that? What disadvantage does this have? > > If you are using a redhat distro, run `service netconsole stop`. > > Or you can disable it via configfs, check > Documentation/networking/netconsole.txt. Ok but this means disabling netconsole nothing I want. Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/