Bug 207075

Summary: The UDP fragmentation offload feature of Virtio-net device can not be turned on in the VM
Product: Networking Reporter: Cheng Jiang (cheng1.jiang)
Component: OtherAssignee: Stephen Hemminger (stephen)
Status: NEW ---    
Severity: normal    
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 5.3.0-45-generic Subsystem:
Regression: No Bisected commit-id:

Description Cheng Jiang 2020-04-03 03:03:54 UTC 
When I use QEMU-KVM to start the VM with the 5.3.0-45-generic kernel, the UDP fragmentation offload feature of the virtio-net device is turned off and cannot be turned on.
But if I change the kernel version to 4.4.0-142-generic, the UDP fragmentation offload feature of the virtio-net device in the VM is on.