Hi, I have a hypervisor with Fedora 25 on a few machines and ever since upgrading I started getting occasional messages:
[321428.168903] WARNING: CPU: 0 PID: 2279 at net/core/dev.c:2562 skb_warn_bad_offload+0xc4/0x110 [321428.168906] san0: caps=(0x000004009fbb58e9, 0x0000000000000000) len=6769 data_len=6727 gso_size=1480 gso_type=2 ip_summed=0 [321428.168906] Modules linked in: vhost_net vhost tap tun ebtable_filter ebtables ip6table_filter ip6_tables nfsv3 nfs_acl nfs lockd grace fscache fuse cfg80211 openvswitch rfkill nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack intel_rapl sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate iTCO_wdt ipmi_ssif iTCO_vendor_support intel_uncore mei_me ipmi_si intel_rapl_perf raid10 joydev i2c_i801 mei lpc_ich ioatdma shpchp wmi ipmi_devintf ipmi_msghandler acpi_power_meter acpi_pad tpm_tis tpm_tis_core tpm auth_rpcgss sunrpc xfs libcrc32c ast i2c_algo_bit raid1 drm_kms_helper ixgbe ttm drm crc32c_intel mdio ptp pps_core dca [321428.168955] CPU: 0 PID: 2279 Comm: ruby-mri Tainted: G W 4.11.12-200.fc25.x86_64 #1 [321428.168956] Hardware name: Supermicro SYS-1028U-TNRTP+/X10DRU-i+, BIOS 1.1 07/22/2015 [321428.168957] Call Trace: [321428.168962] dump_stack+0x63/0x86 [321428.168965] __warn+0xcb/0xf0 [321428.168966] warn_slowpath_fmt+0x5a/0x80 [321428.168968] skb_warn_bad_offload+0xc4/0x110 [321428.168970] __skb_gso_segment+0x190/0x1a0 [321428.168977] queue_gso_packets+0x62/0x160 [openvswitch] [321428.168979] ? wait_for_completion+0x39/0x180 [321428.168982] ? stop_one_cpu+0x81/0xb0 [321428.168984] ? sched_ttwu_pending+0xd0/0xd0 [321428.168987] ? __skb_flow_dissect+0xcc6/0xfb0 [321428.168989] ? __skb_get_hash+0x8f/0x300 [321428.168992] ovs_dp_upcall+0x31/0x60 [openvswitch] [321428.168994] ovs_dp_process_packet+0x10d/0x130 [openvswitch] [321428.168997] ovs_vport_receive+0x76/0xd0 [openvswitch] [321428.168999] ? wait_for_completion+0x39/0x180 [321428.169001] ? ___slab_alloc+0x2ac/0x570 [321428.169003] ? __alloc_skb+0x87/0x1c0 [321428.169005] ? stop_one_cpu+0x81/0xb0 [321428.169006] ? sched_ttwu_pending+0xd0/0xd0 [321428.169007] ? set_next_entity+0xd9/0x220 [321428.169009] ? __slab_alloc+0x20/0x40 [321428.169010] ? __alloc_skb+0x9b/0x1c0 [321428.169013] internal_dev_xmit+0x28/0x60 [openvswitch] [321428.169014] dev_hard_start_xmit+0xa3/0x1f0 [321428.169016] __dev_queue_xmit+0x592/0x650 [321428.169025] ? udp_packet+0x50/0xa0 [nf_conntrack] [321428.169026] dev_queue_xmit+0x10/0x20 [321428.169029] ip_finish_output2+0x2a9/0x3a0 [321428.169030] ip_finish_output+0x1c7/0x270 [321428.169032] ? ip_finish_output+0x1c7/0x270 [321428.169033] ip_output+0x76/0xe0 [321428.169035] ? ip_fragment.constprop.49+0x80/0x80 [321428.169037] ip_local_out+0x35/0x40 [321428.169038] ip_send_skb+0x19/0x40 [321428.169040] udp_send_skb+0x99/0x260 [321428.169042] udp_sendmsg+0x368/0xa10 [321428.169043] ? ip_reply_glue_bits+0x50/0x50 [321428.169047] ? __check_object_size+0x100/0x19d [321428.169048] inet_sendmsg+0x31/0xb0 [321428.169050] sock_sendmsg+0x38/0x50 [321428.169051] SYSC_sendto+0x101/0x190 [321428.169060] ? handle_mm_fault+0xd3/0x240 [321428.169062] ? __do_page_fault+0x266/0x4e0 [321428.169064] SyS_sendto+0xe/0x10 [321428.169066] entry_SYSCALL_64_fastpath+0x1a/0xa9 [321428.169067] RIP: 0033:0x7fd138484b23 [321428.169068] RSP: 002b:00007ffd8cabc8d0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [321428.169070] RAX: ffffffffffffffda RBX: 00007fd137d2bae0 RCX: 00007fd138484b23 [321428.169070] RDX: 0000000000001a47 RSI: 000000b0ea9c36a0 RDI: 0000000000000007 [321428.169071] RBP: 00007fd137d2bae0 R08: 000000b0e91370e0 R09: 0000000000000010 [321428.169072] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000020 [321428.169072] R13: 0000000000000002 R14: 000000b0e91370d0 R15: 0000000000000000 [321428.169074] ---[ end trace 355a022d9ee054ce ]--- I noticed it's happening with Fedora 26 too. I'm using kernel 4.11.12-200.fc25.x86_64 in this particular example. I'm using OVS 2.5.0-4. Am I supposed to turn off GSO everywhere? I thought it was supposed to automatic. Thanks, Ziemowit _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
