Hi, just wanted to report, thet after switching to 4.19 (fro 4.14.x, so maybe the problem appeared somewhere between), I'm getting tons of similar messages:
Oct 27 09:06:27 xxx kernel: br501: hw csum failure Oct 27 09:06:27 xxx kernel: CPU: 8 PID: 0 Comm: swapper/8 Tainted: G E 4.19.0lb7.00_01_PRE04 #1 Oct 27 09:06:27 xxx kernel: Hardware name: Supermicro Super Server/X11DDW-NT, BIOS 2.0b 03/07/2018 Oct 27 09:06:27 xxx kernel: Call Trace: Oct 27 09:06:27 xxx kernel: <IRQ> Oct 27 09:06:27 xxx kernel: dump_stack+0x5a/0x73 Oct 27 09:06:27 xxx kernel: __skb_checksum_complete+0xba/0xc0 Oct 27 09:06:27 xxx kernel: tcp_error+0x108/0x180 [nf_conntrack] Oct 27 09:06:27 xxx kernel: nf_conntrack_in+0xd2/0x4b0 [nf_conntrack] Oct 27 09:06:27 xxx kernel: ? csum_partial+0xd/0x20 Oct 27 09:06:27 xxx kernel: nf_hook_slow+0x3d/0xb0 Oct 27 09:06:27 xxx kernel: ip_rcv+0xb5/0xd0 Oct 27 09:06:27 xxx kernel: ? ip_rcv_finish_core.isra.12+0x370/0x370 Oct 27 09:06:27 xxx kernel: __netif_receive_skb_one_core+0x52/0x70 Oct 27 09:06:27 xxx kernel: process_backlog+0xa3/0x150 Oct 27 09:06:27 xxx kernel: net_rx_action+0x2af/0x3f0 Oct 27 09:06:27 xxx kernel: __do_softirq+0xd1/0x28c Oct 27 09:06:27 xxx kernel: irq_exit+0xde/0xf0 Oct 27 09:06:27 xxx kernel: do_IRQ+0x54/0xe0 Oct 27 09:06:27 xxx kernel: common_interrupt+0xf/0xf Oct 27 09:06:27 xxx kernel: </IRQ> Oct 27 09:06:27 xxx kernel: RIP: 0010:cpuidle_enter_state+0xb6/0x2e0 Oct 27 09:06:27 xxx kernel: Code: 7e e8 ee 84 b2 ff 8b 5d 04 49 89 c6 0f 1f 44 00 00 31 ff e8 bc 95 b2 ff 80 7c 24 03 00 0f 85 93 01 00 00 fb 66 0f 1f 44 00 00 <4d> 29 fe 48 ba cf f7 5 3 e3 a5 9b c4 20 4c 89 f0 49 c1 fe 3f 48 f7 Oct 27 09:06:27 xxx kernel: RSP: 0018:ffffc90018b17e88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdb Oct 27 09:06:27 xxx kernel: RAX: ffff888faf822600 RBX: 0000000000000008 RCX: 000000000000001f Oct 27 09:06:27 xxx kernel: RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 Oct 27 09:06:27 xxx kernel: RBP: ffffe8ffffa029a8 R08: 0000000000000002 R09: ffe9afdaa39e3efa Oct 27 09:06:27 xxx kernel: R10: 0000000000000377 R11: 0000000000000008 R12: 0000000000000008 Oct 27 09:06:27 xxx kernel: R13: 0000000000000003 R14: 0000000d6670b7ca R15: 0000000d564db458 Oct 27 09:06:27 xxx kernel: ? cpuidle_enter_state+0xa4/0x2e0 Oct 27 09:06:27 xxx kernel: do_idle+0x1e4/0x290 Oct 27 09:06:27 xxx kernel: cpu_startup_entry+0x6f/0x80 Oct 27 09:06:27 xxx kernel: start_secondary+0x1aa/0x200 Oct 27 09:06:27 xxx kernel: secondary_startup_64+0xa4/0xb0 it's being reported for various kernel threads (swapper, ksoftirqd, ...) I tried applying commit db4f1be3ca9b0ef7330763d07bf4ace83ad6f913 Author: Sean Tranchetti <stran...@codeaurora.org> Date: Tue Oct 23 16:04:31 2018 -0600 net: udp: fix handling of CHECKSUM_COMPLETE packets but to no avail.. the system is running virtual machines and using openvswitch with following simple topology: [root@xxx tmp]# ovs-vsctl show 22519243-4f9e-47dc-ac8c-3635f6595c4d Bridge brovs Port brovs Interface brovs type: internal Port "bond0" Interface "eth2" Interface "eth3" Port "vnet0" tag: 502 Interface "vnet0" Port brdef tag: 0 Interface brdef type: internal Port "br51" tag: 51 Interface "br51" type: internal Port "br50" tag: 50 Interface "br50" type: internal Port "br501" tag: 501 Interface "br501" type: internal ovs_version: "2.5.0" is this some known problem? may I provide some additional info? BR nik -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 00 Ostrava tel.: +420 591 166 214 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: ser...@linuxbox.cz -------------------------------------