[Bug 2089012] Re: virtio-net slowdown and error message ens3: bad gso: type: 1, size: 1448

@Hans - thanks - our messages crossed in flight. I've cross posted the
tags where the fixing commit should live, as well as the bug ID that
brought in the fixing commit. It looks like it was brought in as normal
fit-n-finish backports, so this regression should find it self-solving
(knock on wood!)

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Title:
virtio-net slowdown and error message ens3: bad gso: type: 1, size:
1448

Status in linux package in Ubuntu:
Confirmed

Bug description:
On Ubuntu Jammy, when upgrading from linux-image-5.15.0-124-generic to
linux-image-5.15.0-125-generic, we notice on multiple Nutanix VMs:

* A severe slowdown in network performance
* A neverending stream of error messages in dmesg:

[ 779.124760] ens3: bad gso: type: 1, size: 1398
[ 779.136866] ens3: bad gso: type: 1, size: 1398
[ 779.180993] ens3: bad gso: type: 1, size: 1448
[ 779.181002] ens3: bad gso: type: 1, size: 1448
[ 779.181005] ens3: bad gso: type: 1, size: 1448
[ 779.181073] ens3: bad gso: type: 1, size: 1448
[ 779.200088] ens3: bad gso: type: 1, size: 1448
[ 779.200096] ens3: bad gso: type: 1, size: 1448
[ 779.200098] ens3: bad gso: type: 1, size: 1448
[ 870.706518] net_ratelimit: 8 callbacks suppressed

When downgrading to the old kernel, this problem disappears. Forcing
an upgrade to linux-image-5.15.0-126-generic does not help.

This looks a lot like
https://bugzilla.kernel.org/show_bug.cgi?id=219129 but if I
understand the bug tracker well, that patch has already been included
in this kernel.


Some details:

$ lspci -v |grep -i net
00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device


$ lsb_release -rd
Description: Ubuntu 22.04.5 LTS
Release: 22.04

$ apt-cache policy linux-image-generic
linux-image-generic:
Installed: 5.15.0.126.125
Candidate: 5.15.0.126.125
Version table:
*** 5.15.0.126.125 500
500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
100 /var/lib/dpkg/status
5.15.0.125.124 500
500 http://archive.ubuntu.com/ubuntu jammy-security/main amd64 Packages
5.15.0.25.27 500
500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-125-generic 5.15.0-125.135
ProcVersionSignature: Ubuntu 5.15.0-125.135-generic 5.15.167
Uname: Linux 5.15.0-125-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Nov 19 12:49 seq
crw-rw---- 1 root audio 116, 33 Nov 19 12:49 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu82.6
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckResult: pass
CloudArchitecture: x86_64
CloudID: none
CloudName: none
CloudPlatform: none
CloudSubPlatform: config
Date: Tue Nov 19 13:00:32 2024
InstallationDate: Installed on 2022-06-20 (882 days ago)
InstallationMedia: Ubuntu-Server 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220421)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Lsusb-t:
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 480M
MachineType: Nutanix AHV
PciMultimedia:

ProcEnviron:
TERM=screen
PATH=(custom, no user)
LANG=C.UTF8
SHELL=/bin/bash
ProcFB: 0 bochs-drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-125-generic root=UUID=2dabc077-db09-4f81-bbf2-b8390e5bc560 ro ipv6.disable=1
RelatedPackageVersions:
linux-restricted-modules-5.15.0-125-generic N/A
linux-backports-modules-5.15.0-125-generic N/A
linux-firmware 20220329.git681281e4-0ubuntu3.35
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.release: 0.0
dmi.bios.vendor: SeaBIOS
dmi.bios.version: nutanix-ahv-2.20220304.0.2619.el7
dmi.chassis.type: 1
dmi.chassis.vendor: Red Hat
dmi.chassis.version: RHEL 7.6.0 PC (i440FX + PIIX, 1996)
dmi.modalias: dmi:bvnSeaBIOS:bvrnutanix-ahv-2.20220304.0.2619.el7:bd04/01/2014:br0.0:svnNutanix:pnAHV:pvrRHEL7.6.0PC(i440FX+PIIX,1996):cvnRedHat:ct1:cvrRHEL7.6.0PC(i440FX+PIIX,1996):sku:
dmi.product.family: Red Hat Enterprise Linux
dmi.product.name: AHV
dmi.product.version: RHEL 7.6.0 PC (i440FX + PIIX, 1996)
dmi.sys.vendor: Nutanix

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