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Date: Fri, 18 Apr 2014 10:25:21 -0700 From: Cong Wang <xiyou.wangcong@...il.com> To: Marcin Gibula <m.gibula@...il.com> Cc: LKML <linux-kernel@...r.kernel.org>, Linux Kernel Network Developers <netdev@...r.kernel.org> Subject: Re: skb_warn_bad_offload+0xc8/0xd5() at net/core/dev.c:2218 (Please Cc netdev@ for networking bugs...) On Thu, Apr 17, 2014 at 10:40 AM, Marcin Gibula <m.gibula@...il.com> wrote: > Hi, > > I've encountered these warnings on one of my servers running 3.12.17. > Warning probably originates from bridge connecting virtual machines > with bonded interface. > > Is this something I should worry about? Is turning GSO/GRO off > recommended for network bridges? > > [340917.510968] WARNING: CPU: 8 PID: 4487 at net/core/dev.c:2218 > skb_warn_bad_offload+0xc8/0xd5() > [340917.511633] : caps=(0x0000000000195ba9, 0x0000000000000000) > len=1610 data_len=0 gso_size=1448 gso_type=5 ip_summed=0 > [340917.512305] Modules linked in: ebt_dnat ebt_ip ebt_arp act_police > cls_u32 sch_ingress cls_fw sch_sfq sch_htb iptable_raw xt_CT > iptable_filter ebtable_nat ebtables iscsi_tcp libiscsi_tcp libiscsi > scsi_transport_iscsi x86_pkg_temp_thermal hpsa > [340917.513763] CPU: 8 PID: 4487 Comm: qemu-system-x86 Tainted: G > W 3.12.17-gentoo #4 > [340917.514105] Hardware name: HP ProLiant BL460c Gen8, BIOS I31 12/20/2013 > [340917.514440] 0000000000000009 ffff8817dfc03b98 ffffffff81557bf8 > ffff8817dfc03be0 > [340917.514797] ffff8817dfc03bd0 ffffffff81072623 ffff8817b3e4ed00 > ffff8817ba824000 > [340917.515162] 0000000000000005 0000000000000000 ffffffff815c6800 > ffff8817dfc03c30 > [340917.515523] Call Trace: > [340917.515856] <IRQ> [<ffffffff81557bf8>] dump_stack+0x45/0x56 > [340917.516213] [<ffffffff81072623>] warn_slowpath_common+0x73/0x90 > [340917.516557] [<ffffffff81072687>] warn_slowpath_fmt+0x47/0x50 > [340917.516900] [<ffffffff8128b81c>] ? ___ratelimit+0x7c/0xf0 > [340917.517239] [<ffffffff81559f67>] skb_warn_bad_offload+0xc8/0xd5 > [340917.517586] [<ffffffff8147b581>] __skb_gso_segment+0x71/0xc0 > [340917.517928] [<ffffffff8147b89b>] dev_hard_start_xmit+0x19b/0x4a0 > [340917.518265] [<ffffffff8147bec2>] dev_queue_xmit+0x322/0x460 > [340917.518606] [<ffffffff815200b0>] ? br_forward_finish+0x60/0x60 > [340917.518946] [<ffffffff81520017>] br_dev_queue_push_xmit+0x87/0xc0 > [340917.519308] [<ffffffff8152006d>] br_forward_finish+0x1d/0x60 > [340917.519653] [<ffffffff81520106>] __br_forward+0x56/0xc0 > [340917.519996] [<ffffffff8151ff6e>] deliver_clone+0x2e/0x50 > [340917.520335] [<ffffffff81520539>] br_forward+0x39/0x60 > [340917.520680] [<ffffffff815212b1>] br_handle_frame_finish+0x201/0x310 > [340917.521021] [<ffffffff8152154d>] br_handle_frame+0x18d/0x250 > [340917.521360] [<ffffffff81478de2>] __netif_receive_skb_core+0x212/0x800 > [340917.521704] [<ffffffff81095658>] ? __wake_up_common+0x58/0x90 > [340917.522048] [<ffffffff814793e3>] __netif_receive_skb+0x13/0x60 > [340917.522386] [<ffffffff8147a658>] process_backlog+0x98/0x170 > [340917.522727] [<ffffffff8147a521>] net_rx_action+0x101/0x1a0 > [340917.523062] [<ffffffff81076489>] __do_softirq+0xd9/0x1a0 > [340917.523404] [<ffffffff81565afc>] call_softirq+0x1c/0x30 > [340917.523750] <EOI> [<ffffffff81039225>] do_softirq+0x35/0x70 > [340917.524111] [<ffffffff81477d48>] netif_rx_ni+0x28/0x30 > [340917.524456] [<ffffffff813859d1>] tun_get_user+0x3f1/0x7f0 > [340917.524798] [<ffffffff81385ecb>] tun_chr_aio_write+0x7b/0xa0 > [340917.525142] [<ffffffff811396d7>] do_sync_readv_writev+0x47/0x80 > [340917.525487] [<ffffffff8113a9bf>] do_readv_writev+0xcf/0x230 > [340917.525824] [<ffffffff81173161>] ? fsnotify+0x231/0x310 > [340917.526161] [<ffffffff810d1eab>] ? __secure_computing+0x6b/0x1d0 > [340917.526496] [<ffffffff8113aba0>] vfs_writev+0x30/0x60 > [340917.526829] [<ffffffff8113acb4>] SyS_writev+0x44/0xa0 > [340917.527158] [<ffffffff81564ad9>] tracesys+0xd0/0xd5 > [340917.527498] ---[ end trace 11d4549ee4aa7812 ]--- > > Driver information: > # ethtool -i eth0 > driver: ixgbe > version: 3.15.1-k > firmware-version: 0x80000684 > bus-info: 0000:04:00.0 > supports-statistics: yes > supports-test: yes > supports-eeprom-access: yes > supports-register-dump: yes > supports-priv-flags: no > > Offloads configuration: > # ethtool -k eth0 > Features for eth0: > rx-checksumming: on > tx-checksumming: on > tx-checksum-ipv4: on > tx-checksum-ip-generic: off [fixed] > tx-checksum-ipv6: on > tx-checksum-fcoe-crc: off [fixed] > tx-checksum-sctp: on > scatter-gather: on > tx-scatter-gather: on > tx-scatter-gather-fraglist: off [fixed] > tcp-segmentation-offload: off > tx-tcp-segmentation: off > tx-tcp-ecn-segmentation: off [fixed] > tx-tcp6-segmentation: off > udp-fragmentation-offload: off [fixed] > generic-segmentation-offload: on > generic-receive-offload: on > large-receive-offload: off > rx-vlan-offload: on > tx-vlan-offload: on > ntuple-filters: off > receive-hashing: on > highdma: on [fixed] > rx-vlan-filter: on > vlan-challenged: off [fixed] > tx-lockless: off [fixed] > netns-local: off [fixed] > tx-gso-robust: off [fixed] > tx-fcoe-segmentation: off [fixed] > tx-gre-segmentation: off [fixed] > tx-udp_tnl-segmentation: off [fixed] > tx-mpls-segmentation: off [fixed] > fcoe-mtu: off [fixed] > tx-nocache-copy: on > loopback: off [fixed] > rx-fcs: off [fixed] > rx-all: off > tx-vlan-stag-hw-insert: off [fixed] > rx-vlan-stag-hw-parse: off [fixed] > rx-vlan-stag-filter: off [fixed] > > -- > mg > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- 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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