From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: IPv6 FIB related crash with MACVLANs in 3.9.11+ kernel. Date: Mon, 03 Feb 2014 14:06:55 -0800 Message-ID: <52F012FF.9030105@candelatech.com> References: <52EFFE20.5080500@candelatech.com> <20140203220323.GB17999@order.stressinduktion.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit To: netdev Return-path: Received: from mail.candelatech.com ([208.74.158.172]:59366 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752388AbaBCWGz (ORCPT ); Mon, 3 Feb 2014 17:06:55 -0500 Received: from [192.168.100.236] (firewall.candelatech.com [70.89.124.249]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id s13M6txQ004537 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 3 Feb 2014 14:06:55 -0800 In-Reply-To: <20140203220323.GB17999@order.stressinduktion.org> Sender: netdev-owner@vger.kernel.org List-ID: On 02/03/2014 02:03 PM, Hannes Frederic Sowa wrote: > Hi Ben, > > On Mon, Feb 03, 2014 at 12:37:52PM -0800, Ben Greear wrote: >> The kernel has some additional patches, but not much to IPv6. >> >> The bug is that when we have lots of mac-vlans on some ixgbe ports >> (500 per interface in this case), and boot up the system with the ports unplugged, >> we get this crash almost every time. Boot-up is going to do normal bootup >> stuff plus create and configure the 1000 mac-vlans, dump their routing >> tables, etc. >> >> We are using one routing table per network device, and some >> ip rules. >> >> If we plug in the ixgbe ports, we do not ever see a crash. >> >> We have not yet tried reproducing it on other drivers, but I suspect >> the issue is not related to ixgbe. >> >> Any ideas on this one? > > Could you bring the machine to a panic again with enabling RT6_DEBUG at the > top of ip6_fib.c and send a dump of the trace? Yes, but it will be a bit until we can create a duplicate machine. We ended up delivering the machine with a note to make sure the interfaces were plugged in (we found the bug hours before shipping the system, of course). Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com