From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jay Vosburgh Subject: Re: bonding reports interface up with 0 Mbps Date: Thu, 04 Feb 2016 12:29:33 -0800 Message-ID: <22896.1454617773@famine> References: <87618083B2453E4A8714035B62D6799250524233@FMSMSX105.amr.corp.intel.com> Cc: "netdev@vger.kernel.org" , "gospo@cumulusnetworks.com" , zhuyj , "jiri@mellanox.com" To: "Tantilov, Emil S" Return-path: Received: from youngberry.canonical.com ([91.189.89.112]:54162 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751411AbcBDU3i (ORCPT ); Thu, 4 Feb 2016 15:29:38 -0500 In-reply-to: <87618083B2453E4A8714035B62D6799250524233@FMSMSX105.amr.corp.intel.com> Sender: netdev-owner@vger.kernel.org List-ID: Tantilov, Emil S wrote: >We are seeing an occasional issue where the bonding driver may report interface up with 0 Mbps: >bond0: link status definitely up for interface eth0, 0 Mbps full duplex > >So far in all the failed traces I have collected this happens on NETDEV_CHANGELOWERSTATE event: > ><...>-20533 [000] .... 81811.041241: ixgbe_service_task: eth1: NIC Link is Up 10 Gbps, Flow Control: RX/TX ><...>-20533 [000] .... 81811.041257: ixgbe_check_vf_rate_limit <-ixgbe_service_task ><...>-20533 [000] .... 81811.041272: ixgbe_ping_all_vfs <-ixgbe_service_task >kworker/u48:0-7503 [010] .... 81811.041345: ixgbe_get_stats64 <-dev_get_stats >kworker/u48:0-7503 [010] .... 81811.041393: bond_netdev_event: eth1: event: 1b >kworker/u48:0-7503 [010] .... 81811.041394: bond_netdev_event: eth1: IFF_SLAVE >kworker/u48:0-7503 [010] .... 81811.041395: bond_netdev_event: eth1: slave->speed = ffffffff ><...>-20533 [000] .... 81811.041407: ixgbe_ptp_overflow_check <-ixgbe_service_task >kworker/u48:0-7503 [010] .... 81811.041407: bond_mii_monitor: bond0: link status definitely up for interface eth1, 0 Mbps full duplex Thinking about the trace again... Emil: what happens in the trace before this? Is there ever a call to the ixgbe_get_settings? Does a NETDEV_UP or NETDEV_CHANGE event ever hit the bond_netdev_event function? Could you describe your test that reproduces this? I'd like to see if I can set it up locally. -J --- -Jay Vosburgh, jay.vosburgh@canonical.com