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Date: Mon, 30 Jan 2012 08:08:24 -0800 From: Stephen Hemminger <shemminger@...tta.com> To: netdev@...r.kernel.org Subject: Fw: [Bug 42693] New: WARNING: at net/core/dev.c:1886 skb_gso_segment+0x2ab/0x320() Begin forwarded message: Date: Mon, 30 Jan 2012 12:28:10 GMT From: bugzilla-daemon@...zilla.kernel.org To: shemminger@...ux-foundation.org Subject: [Bug 42693] New: WARNING: at net/core/dev.c:1886 skb_gso_segment+0x2ab/0x320() https://bugzilla.kernel.org/show_bug.cgi?id=42693 Summary: WARNING: at net/core/dev.c:1886 skb_gso_segment+0x2ab/0x320() Product: Networking Version: 2.5 Kernel Version: 3.0.18 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: IPV4 AssignedTo: shemminger@...ux-foundation.org ReportedBy: web.igor@...g.net Regression: Yes These warnings pops up a few times a second when a relatively high load is imposed on 10Gbit ethernet, and causing performance degradation. Looking into code, it seems to be related to segmentation offload, GSO, and checksums. The igb and ixgbe modules are out-of-kernel versions from sourceforge. IGB 3.3.6 and IXGBE 3.7.17, latest at the moment. When i've fallen back to the 2.6.39.4 with the same modules, the problems disappear. [ 826.097369] ------------[ cut here ]------------ [ 826.097372] WARNING: at net/core/dev.c:1886 skb_gso_segment+0x2ab/0x320() [ 826.097374] ixgbe: caps=(0x72114bb3, 0x0) len=3150 data_len=0 ip_summed=0 [ 826.097375] Modules linked in: ixgbe igb [ 826.097377] Pid: 0, comm: swapper Tainted: G W 3.0.18 #2 [ 826.097379] Call Trace: [ 826.097379] <IRQ> [<ffffffff8104162c>] ? warn_slowpath_common+0x6c/0xa0 [ 826.097383] [<ffffffff81041715>] ? warn_slowpath_fmt+0x45/0x50 [ 826.097386] [<ffffffff8132353b>] ? skb_gso_segment+0x2ab/0x320 [ 826.097389] [<ffffffff81324f1e>] ? dev_hard_start_xmit+0x21e/0x5f0 [ 826.097391] [<ffffffff8133af53>] ? sch_direct_xmit+0xf3/0x1c0 [ 826.097393] [<ffffffff81325445>] ? dev_queue_xmit+0x155/0x5a0 [ 826.097395] [<ffffffff81274b0a>] ? bond_start_xmit+0x3da/0x470 [ 826.097397] [<ffffffff81366e38>] ? tcp_v4_rcv+0x4c8/0x740 [ 826.097400] [<ffffffff81324f62>] ? dev_hard_start_xmit+0x262/0x5f0 [ 826.097402] [<ffffffff81345db5>] ? ip_local_deliver+0x85/0x110 [ 826.097404] [<ffffffff81325696>] ? dev_queue_xmit+0x3a6/0x5a0 [ 826.097406] [<ffffffff8138a53d>] ? br_dev_queue_push_xmit+0x4d/0x70 [ 826.097408] [<ffffffff8138b11b>] ? br_handle_frame_finish+0x10b/0x1c0 [ 826.097410] [<ffffffff8138b371>] ? br_handle_frame+0x1a1/0x210 [ 826.097412] [<ffffffff81274510>] ? bond_set_carrier+0xa0/0xa0 [ 826.097414] [<ffffffff8138b1d0>] ? br_handle_frame_finish+0x1c0/0x1c0 [ 826.097416] [<ffffffff81322d8d>] ? __netif_receive_skb+0x12d/0x370 [ 826.097419] [<ffffffff81323e48>] ? netif_receive_skb+0x58/0x80 [ 826.097421] [<ffffffff81324249>] ? dev_gro_receive+0x1c9/0x2c0 [ 826.097423] [<ffffffff81324943>] ? napi_gro_receive+0xa3/0xc0 [ 826.097427] [<ffffffffa0064108>] ? ixgbe_poll+0x3f8/0x13f0 [ixgbe] [ 826.097429] [<ffffffff81070800>] ? hotplug_cfd+0x10/0x40 [ 826.097431] [<ffffffff81324541>] ? net_rx_action+0x81/0x120 [ 826.097433] [<ffffffff81046f78>] ? __do_softirq+0x98/0x120 [ 826.097435] [<ffffffff8107ed2a>] ? handle_irq_event_percpu+0x7a/0x140 [ 826.097437] [<ffffffff813a228c>] ? call_softirq+0x1c/0x30 [ 826.097439] [<ffffffff81003f2d>] ? do_softirq+0x4d/0x80 [ 826.097441] [<ffffffff81047266>] ? irq_exit+0x96/0xc0 [ 826.097443] [<ffffffff81003dec>] ? do_IRQ+0x5c/0xd0 [ 826.097445] [<ffffffff813a0d93>] ? common_interrupt+0x13/0x13 [ 826.097446] <EOI> [<ffffffff81009738>] ? mwait_idle+0x58/0x80 [ 826.097450] [<ffffffff810009ec>] ? cpu_idle+0x4c/0x90 [ 826.097452] [<ffffffff8154485b>] ? start_kernel+0x2b0/0x2bb [ 826.097453] ---[ end trace f7478101639067dd ]--- -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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