Poor virtio-net performance and "bad gso: type: 1, size:" logged in RHEL 9.5
Issue
- Since upgrading to RHEL 9.5, virtio-net network throughput performance is poor, and the following message is constantly logged into the kernel log and systemd journal and
messages
file:
kernel: eth0: bad gso: type: 1, size: 1368
kernel: eth0: bad gso: type: 1, size: 1368
kernel: eth0: bad gso: type: 1, size: 1368
Environment
- Red Hat Enterprise Linux 9.5
- Any RHEL 9.5
kernel-5.14.0-503.el9
series earlier thankernel-5.14.0-503.19.1.el9_5
- Any RHEL 9.5
- KVM based virtualization (including Nutanix AHV)
virtio-net
paravirtualized network adapter
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