From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesper Dangaard Brouer Subject: LRO disable warnings on kernel 2.6.38 Date: Fri, 18 Mar 2011 12:12:23 +0100 Message-ID: <1300446743.11985.317.camel@firesoul.comx.local> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , Neil Horman , Alexander Duyck To: netdev Return-path: Received: from lanfw001a.cxnet.dk ([87.72.215.196]:40631 "EHLO lanfw001a.cxnet.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752110Ab1CRLYH (ORCPT ); Fri, 18 Mar 2011 07:24:07 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Hi I'm seeing the LRO disable warnings using kernel 2.6.38: [ 8.664759] NET: Registered protocol family 10 [ 8.838148] ADDRCONF(NETDEV_UP): eth71: link is not ready [ 8.872639] ------------[ cut here ]------------ [ 8.872645] WARNING: at net/core/dev.c:1363 dev_disable_lro+0x7b/0x80() [ 8.872647] Hardware name: ProLiant DL370 G6 [ 8.872648] Modules linked in: ipv6 nf_conntrack ip_tables loop i7core_edac edac_core ipmi_si ipmi_msghandler joydev hpilo pcspkr sg hpsa igb ata_piix netxen_nic dca [last unloaded: scsi_wait_scan] [ 8.872660] Pid: 2221, comm: sysctl Not tainted 2.6.38-comx04 #2 [ 8.872662] Call Trace: [ 8.872671] [] ? warn_slowpath_common+0x7f/0xc0 [ 8.872675] [] ? warn_slowpath_null+0x1a/0x20 [ 8.872680] [] ? dev_disable_lro+0x7b/0x80 [ 8.872686] [] ? devinet_sysctl_forward+0x147/0x180 [ 8.872691] [] ? proc_sys_call_handler+0x97/0xd0 [ 8.872700] [] ? proc_sys_write+0x14/0x20 [ 8.872704] [] ? vfs_write+0xc8/0x180 [ 8.872707] [] ? sys_write+0x51/0x90 [ 8.872712] [] ? system_call_fastpath+0x16/0x1b [ 8.872714] ---[ end trace 6245283cb8d484cc ]--- The strange part is that I didn't see this warning on my testlab and pre-prod servers. The warning is from the first production server, which got kernel 2.6.38 deployed this morning. The NIC driver is igb. The only difference in hardware between the production and pre-production server (which didn't show the warning), is the prod-server have an extra dual-port original Intel NIC, dev-named "eth71". And its just after the init of eth71, the warning occurs. We usually use a 6 port NIC from Hotlava, which is based on the same chip 82576 and also uses the same igb driver. Intel orig NIC eth71 albpd4:~# ethtool -i eth71 driver: igb version: 2.1.0-k2 firmware-version: 1.2-1 bus-info: 0000:21:00.0 Hotlava Intel chip based NIC eth51: albpd4:~# ethtool -i eth51 driver: igb version: 2.1.0-k2 firmware-version: 1.2-1 bus-info: 0000:1d:00.1 I don't understand why I don't see the warning on my pre-prod server, which only have the Hotlava NIC?!? -- Med venlig hilsen / Best regards Jesper Brouer ComX Networks A/S Linux Network Kernel Developer Cand. Scient Datalog / MSc.CS Author of http://adsl-optimizer.dk LinkedIn: http://www.linkedin.com/in/brouer