*** This bug is a duplicate of bug 2098961 ***
https://bugs.launchpad.net/bugs/2098961
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2098973
Title:
Severe degradation of network performance virtio-net bad gso: type: 4
Status in linux package in Ubuntu:
Confirmed
Bug description:
Severe degradation of network performance in VM with virtio-net on noble
after upgrading from linux-image-6.8.0-51-generic
to the current kernel version linux-image-6.8.0-53-generic.
Expected speed up to 10 Gbit/s
Instead only up to 10 Mbit/s
The Problem exists only on VMs not on host systems.
Lots of the folling errors in dmesg:
[ 35.486430] enp2s0: bad gso: type: 4, size: 1448
[ 35.750641] enp2s0: bad gso: type: 4, size: 1448
[ 38.390268] net_ratelimit: 9 callbacks suppressed
[ 38.390276] enp2s0: bad gso: type: 4, size: 1448
[ 38.654318] enp2s0: bad gso: type: 4, size: 1448
[ 38.918270] enp2s0: bad gso: type: 4, size: 1448
[ 39.182372] enp2s0: bad gso: type: 4, size: 1448
[ 39.446477] enp2s0: bad gso: type: 4, size: 1448
[ 39.710402] enp2s0: bad gso: type: 4, size: 1448
[ 39.974488] enp2s0: bad gso: type: 4, size: 1448
[ 40.238648] enp2s0: bad gso: type: 4, size: 1448
[ 40.502357] enp2s0: bad gso: type: 4, size: 1448
[ 40.766495] enp2s0: bad gso: type: 4, size: 1448
[ 43.406820] net_ratelimit: 9 callbacks suppressed
When downgrading to linux-image-6.8.0-51-generic the problem
disappers.
In our Setup we use a bridge in the host system to connect the VMs
directly to the network. Inside the VMs we use macvlan to
provide networking for systemd-nspawn containers.
Look very similar to this fixed bug report on jammy:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2089012
cat /proc/version_signature > version.log
Ubuntu 6.8.0-53.55-generic 6.8.12
lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04.2 LTS
Release: 24.04
apt-cache policy linux-image-virtual
linux-image-virtual:
Installed: 6.8.0-53.55+1
Candidate: 6.8.0-53.55+1
Version table:
*** 6.8.0-53.55+1 500
500 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
100 /var/lib/dpkg/status
6.8.0-52.53 500
500 http://security.ubuntu.com/ubuntu noble-security/main amd64
Packages
6.8.0-31.31 500
500 http://archive.ubuntu.com/ubuntu noble/main amd64 Packages
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