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, 29 Sep 2014 11:44:22 -0700 Message-ID: <5429A886.1040809@candelatech.com> References: <52EFFE20.5080500@candelatech.com> <20140203220323.GB17999@order.stressinduktion.org> <52F012FF.9030105@candelatech.com> <52F65EB4.1050306@candelatech.com> <20140208172310.GF16198@order.stressinduktion.org> <1411906297.2400343.172598909.66223582@webmail.messagingengine.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Hongmei Li Return-path: Received: from mail2.candelatech.com ([208.74.158.173]:51722 "EHLO mail2.candelatech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753898AbaI2SoX (ORCPT ); Mon, 29 Sep 2014 14:44:23 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 09/29/2014 11:15 AM, Hongmei Li wrote: > Thanks Hannes for your prompt response! > > We just encountered this issue two times in our product stability test so far, > and my panic backtrace is the exactly same with the one reported here. > I don't know how to reproduce the issue till now. > I tried several method, unfortunately, I can not reproduce it by myself. :( We could reproduce it easily using our user-space tool that creates 1000 mac-vlans, configures them, dumps routing tables, etc. But, we could only reproduce it when we had the ixgbe ports unplugged. If they were properly connected to a switch, we did not see any crashes. My original email on 2/3/2014 has more details, and the thread that follows has some info on debugging we did at the time. We will be happy to test patches... Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com