That is good news. That means we can perform a "Reverse" kernel bisect to identify the commit that fixes this. Can you test some kernels to perform the bisect? I can build them and post links to them here. It would take testing of about 10-12 kernels.
To start the bisect, we first need to identify the last BAD kernel and the first GOOD kernel. Currently we know the 4.4 based kernel in Xenial is bad. The 4.8-rc3 kernel is good. Can you next test the upstream 4.7 final kernel? It can be downloaded from: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7/ If that one is good, can try the 4.6, then 4.5, etc. Thanks! ** Changed in: linux (Ubuntu) Status: Incomplete => Triaged ** Tags added: performing-bisect ** Also affects: linux (Ubuntu Yakkety) Importance: Medium Status: Triaged ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Xenial) Status: New => Triaged ** Changed in: linux (Ubuntu Xenial) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Xenial) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu Yakkety) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu Yakkety) Status: Triaged => In Progress ** Changed in: linux (Ubuntu Xenial) Status: Triaged => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1614953 Title: hw csum failure when IPv6 interfaces configured in netdev_rx_csum_fault+0x38/0x40 Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: In Progress Status in linux source package in Yakkety: In Progress Bug description: Since I started using IPv6 I noticed the following kernel error: Thu Aug 18 15:05:01 2016] <unknown>: hw csum failure [Thu Aug 18 15:05:01 2016] CPU: 5 PID: 11086 Comm: Chrome_IOThread Tainted: P OE 4.4.0-34-generic #53-Ubuntu [Thu Aug 18 15:05:01 2016] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-D3H, BIOS F22 11/14/2013 [Thu Aug 18 15:05:01 2016] 0000000000000286 00000000c05989f2 ffff8807573dfcd0 ffffffff813f11b3 [Thu Aug 18 15:05:01 2016] 0000000000000000 0000000000000008 ffff8807573dfce8 ffffffff8171f6e8 [Thu Aug 18 15:05:01 2016] 0000000000000074 ffff8807573dfd30 ffffffff8171639b 00000000fe091360 [Thu Aug 18 15:05:01 2016] Call Trace: [Thu Aug 18 15:05:01 2016] [<ffffffff813f11b3>] dump_stack+0x63/0x90 [Thu Aug 18 15:05:01 2016] [<ffffffff8171f6e8>] netdev_rx_csum_fault+0x38/0x40 [Thu Aug 18 15:05:01 2016] [<ffffffff8171639b>] skb_copy_and_csum_datagram_msg+0xeb/0x100 [Thu Aug 18 15:05:01 2016] [<ffffffff817ec0b3>] udpv6_recvmsg+0x233/0x670 [Thu Aug 18 15:05:01 2016] [<ffffffff8179dc4e>] inet_recvmsg+0x7e/0xb0 [Thu Aug 18 15:05:01 2016] [<ffffffff817061fb>] sock_recvmsg+0x3b/0x50 [Thu Aug 18 15:05:01 2016] [<ffffffff81706451>] SYSC_recvfrom+0xe1/0x160 [Thu Aug 18 15:05:01 2016] [<ffffffff810ac0b0>] ? wake_up_q+0x70/0x70 [Thu Aug 18 15:05:01 2016] [<ffffffff8170785e>] SyS_recvfrom+0xe/0x10 [Thu Aug 18 15:05:01 2016] [<ffffffff8182def2>] entry_SYSCALL_64_fastpath+0x16/0x71 It repeats periodically: $ dmesg -T | grep 'hw csum failure' | wc -l 201 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-34-generic 4.4.0-34.53 ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15 Uname: Linux 4.4.0-34-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: Unity Date: Fri Aug 19 13:47:54 2016 HibernationDevice: RESUME=UUID=066c8903-7f5e-43d5-b48f-76d33c4558f2 InstallationDate: Installed on 2016-04-24 (116 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M. ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic.efi.signed root=/dev/mapper/rootpool-rootvol ro intel_iommu=on RelatedPackageVersions: linux-restricted-modules-4.4.0-34-generic N/A linux-backports-modules-4.4.0-34-generic N/A linux-firmware 1.157.3 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/14/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F22 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z77-D3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF22:bd11/14/2013:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ77-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1614953/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
