I'd like to perform a kernel bisect to figure out which commit caused this regression. We need to identify the earliest kernel that did not exhibit the bug and the first kernel that did exhibit the bug.
Can you test the following kernels and post back? 4.8 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8/ 4.9-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc1/ 4.9 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/ 4.10-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc1/ 4.10-rc4: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc4/ You don't have to test every kernel, just up until the kernel that first has this bug. Based on your test results, we can figure out which kernel to test next. Thanks in advance! ** Also affects: linux (Ubuntu Zesty) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Zesty) Status: New => Triaged ** Changed in: linux (Ubuntu) Status: Incomplete => Triaged ** Changed in: linux (Ubuntu Zesty) Importance: Undecided => Medium -- 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/1678585 Title: [Zesty] TSO doesn't work properly Status in linux package in Ubuntu: Triaged Status in linux source package in Zesty: Triaged Bug description: The TSO (TCP segmentation offload), By default it is shown to be ON, but actually aggregation doesn’t happen. When turning it on again - aggregation is observed. Same behavior for mlx4_en, mlx5_core, igb. Steps to repro: 1. root:~# uname -r 4.10.0-14-generic 2. root:~# ethtool -i eno2 driver: igb version: 5.4.0-k firmware-version: 1.63, 0x800009fa expansion-rom-version: bus-info: 0000:06:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no 3. root:~# ethtool -k eno2 | grep offload tcp-segmentation-offload: on udp-fragmentation-offload: off [fixed] generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off [fixed] rx-vlan-offload: on tx-vlan-offload: on l2-fwd-offload: off [fixed] hw-tc-offload: off [fixed] 4. root@:~# ethtool -K eno2 gso off 5. root@:~# ethtool -k eno2 | grep offload tcp-segmentation-offload: on udp-fragmentation-offload: off [fixed] generic-segmentation-offload: off generic-receive-offload: on large-receive-offload: off [fixed] rx-vlan-offload: on tx-vlan-offload: on l2-fwd-offload: off [fixed] hw-tc-offload: off [fixed] 6. netperf -H 10.195.43.1 -l 4 -t TCP_STREAM -c -C -- -m 15000 Traffic size less or equal to 1514 is observed, despite the fact TSO is on. 7. ethtool -K eno2 tso on 8. netperf -H 10.195.43.1 -l 4 -t TCP_STREAM -c -C -- -m 15000 Traffic size of 64K is observed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678585/+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
