Description of problem: Updating to 3.20 kernels on my virtio kvm guests breaks networking in strange ways. System can get DHCP address fine and tshark shows some traffic, but almost everything else (DNS, ping, ssh) fails. Version-Release number of selected component (if applicable): 3.20.0-0.rc0.git4.1.fc23 3.20.0-0.rc0.git7.3.fc23 How reproducible: two kvm guests so far
Perhaps someone could run dmesg on both 3.20 and 3.19 and diff the two for changes?
Reproduced: with kernel-3.20 I cannot ping any hosts, unlike with 3.19. ie kernel-3.19.0-0.rc7.git3.1.fc22 works fine but not kernel-3.20.0-0.rc0.git*.fc22 apparently. I really think this should be a no-brainer Alpha blocker but I can't remember if kvm counts.
(Maybe this is also the reason I can't get net working in F22 boot.iso or in fresh F22 install under kvm.)
The dmesg diff doesn't seem to contain anything useful. Maybe journalctl output diff would be better?
Eric Paris pointed out on #fedora-devel that kernel-3.20.0-0.rc0.git9.1.fc22 seems to fix this. and git9.1 is working okay for me.
Confirmed fixed for me.