Hi Neal and Martin, Sorry for disturbing, our production system(3.14 and 3.18 stable kernel) have many tcp_fragment warnings, the trace is same as below one which you discussed before.
http://comments.gmane.org/gmane.linux.network/365658 But I didn't found the final solution in that mail thread, do you have any new ideas or patches on this warning? Great thanks. [5184217.672290] WARNING: CPU: 9 PID: 2801 at net/ipv4/tcp_output.c:1081 tcp_fragment+0x34/0x230() [5184217.680995] Modules linked in: sfc_char(O) sfc_resource(O) sfc_affinity(O) nf_conntrack_netlink xt_connlimit xt_length xt_bpf xt_hashlimit iptable_nat nf_nat_ipv4 nf_nat iptable_mangle xt_comment ip6table_security ip6table_mangle ip_set_hash_netport 8021q garp bridg e stp llc ipmi_devintf nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6table_raw ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_NFLOG nfnetlink_log xt_conntrack iptable_filter xt_tcpudp xt_multiport xt_CT nf_conntrack xt_set iptable_raw ip_tables x_tables ip_set_hash _net ip_set_hash_ip ip_set nfnetlink rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 fuse nfsv3 nfs_acl nfs fscache lockd sunrpc tcp_cubic sg sfc(O) mtd mdio igb dca i2c_algo_bit ptp pps_core sd_mod crct10dif_generic crc_t10dif crct10dif_common x86_pkg_temp_thermal acpi_c pufreq coretemp kvm_intel kvm crc32c_intel aesni_intel ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 ahci libahci ehci_pci libata ehci_hcd i2c_i801 i2c_core lpc_ich mfd_core usbcore scsi_mod usb_common wmi evdev ipmi_si ipmi_msghandler tpm_tis tpm acpi_pad proce ssor thermal_sys button [5184217.684098] CPU: 9 PID: 2801 Comm: rrdns Tainted: G W O 3.14.28-cloudflare #1 [5184217.684099] Hardware name: Quanta Computer Inc QuantaPlex T41S-2U/S2S-MB, BIOS S2S_3A14 09/18/2014 [5184217.684100] 0000000000000000 ffffffff81466263 0000000000000000 ffffffff8103bb34 [5184217.684101] ffffffff813e07f2 ffff8818abebcc00 000000000000004a 0000000000000002 [5184217.684102] 0000000000000060 ffffffff813e07f2 0000003000004120 ffff8818abebcc00 [5184217.684104] Call Trace: [5184217.684105] <IRQ> [<ffffffff81466263>] ? dump_stack+0x41/0x51 [5184217.684111] [<ffffffff8103bb34>] ? warn_slowpath_common+0x74/0x89 [5184217.684115] [<ffffffff813e07f2>] ? tcp_fragment+0x34/0x230 [5184217.684118] [<ffffffff813e07f2>] ? tcp_fragment+0x34/0x230 [5184217.684119] [<ffffffff813d98b7>] ? tcp_mark_head_lost+0x1bd/0x1d5 [5184217.684123] [<ffffffff813ddb71>] ? tcp_fastretrans_alert+0x69f/0x71d [5184217.684125] [<ffffffff813de567>] ? tcp_ack+0x90f/0xb16 [5184217.684126] [<ffffffff813df618>] ? tcp_rcv_state_process+0x5bd/0x9b8 [5184217.684128] [<ffffffff8106d9c0>] ? __wake_up_sync_key+0x3a/0x4d [5184217.684130] [<ffffffff813920ed>] ? sk_wake_async+0x17/0x34 [5184217.684133] [<ffffffff81440d13>] ? ipv6_skip_exthdr+0x28/0xc7 [5184217.684139] [<ffffffff81418db6>] ? NF_HOOK_THRESH.constprop.11+0x4a/0x4a [5184217.684143] [<ffffffff81435abe>] ? tcp_v6_do_rcv+0x3ac/0x4f1 [5184217.684146] [<ffffffff81435eec>] ? tcp_v6_rcv+0x2e9/0x554 [5184217.684148] [<ffffffff813c70d3>] ? nf_hook_slow+0x66/0xf1 [5184217.684150] [<ffffffff81418db6>] ? NF_HOOK_THRESH.constprop.11+0x4a/0x4a [5184217.684167] [<ffffffff81418f70>] ? ip6_input_finish+0x1ba/0x2a7 [5184217.684169] [<ffffffff813a1c12>] ? __netif_receive_skb_core+0x422/0x494 [5184217.684172] [<ffffffff813a283a>] ? netif_receive_skb_internal+0x37/0x6d [5184217.684188] [<ffffffffa09a2e40>] ? efx_ssr_try_merge+0x336/0x34e [sfc] [5184217.684215] [<ffffffffa09a4075>] ? __efx_ssr_end_of_burst+0x3e/0xd2 [sfc] [5184217.684225] [<ffffffffa098e3bd>] ? efx_process_channel+0x5d/0x71 [sfc] [5184217.684243] [<ffffffffa098f557>] ? efx_poll+0x6d/0x16b [sfc] [5184217.684248] [<ffffffff813a2e27>] ? net_rx_action+0xc6/0x191 [5184217.684250] [<ffffffff8103f7ee>] ? __do_softirq+0x100/0x27c [5184217.684254] [<ffffffff8103fae6>] ? irq_exit+0x51/0xbc [5184217.684255] [<ffffffff81003e35>] ? do_IRQ+0x9d/0xb4 [5184217.684258] [<ffffffff8146992a>] ? common_interrupt+0x6a/0x6a [5184217.684261] <EOI> <4>[5184217.684263] ---[ end trace 4f42d23abf1c890e ]--- [5184217.684460] ------------[ cut here ]------------ -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
