unregistered_netdevice: waiting for lo to become free

[decibel83]

Hi.
I have a PVE cluster made with Proxmox VE 5.1 nodes.

Sometimes when start tasks on VMs (start, stop, etc) I get this error on the nodes console:

unregistered_netdevice: waiting for lo to become free. Usage count = 1

When I get this error the task seems to be hanged and does not complete and I have to wait some minutes to have it successfully ended.

I searched on the web and I only found informations about a kernel bug which should be solved on recent releases.

This is my pveperf:

root@node01:~# pveversion -v
proxmox-ve: 5.1-26 (running kernel: 4.13.4-1-pve)
pve-manager: 5.1-36 (running version: 5.1-36/131401db)
pve-kernel-4.13.4-1-pve: 4.13.4-26
libpve-http-server-perl: 2.0-6
lvm2: 2.02.168-pve6
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-15
qemu-server: 5.0-17
pve-firmware: 2.0-3
libpve-common-perl: 5.0-20
libpve-guest-common-perl: 2.0-13
libpve-access-control: 5.0-7
libpve-storage-perl: 5.0-16
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-2
pve-docs: 5.1-12
pve-qemu-kvm: 2.9.1-2
pve-container: 2.0-17
pve-firewall: 3.0-3
pve-ha-manager: 2.0-3
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.1.0-2
lxcfs: 2.0.7-pve4
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.7.3-pve1~bpo9

Could you help me please?

Thanks!

 

[wolfgang]

Hi,
Please update to current kernel 4.13.8-3.

 

[decibel83]

Hi,
Please update to current kernel 4.13.8-3.

Hi wolfgang, all nodes are upgraded to 4.13.13-5-pve #1 SMP PVE 4.13.13-38 kernel but I'm still having this error.

uname -a
Linux node03 4.13.13-5-pve #1 SMP PVE 4.13.13-38 (Fri, 26 Jan 2018 10:47:09 +0100) x86_64 GNU/Linux

proxmox-ve: 5.1-38 (running kernel: 4.13.13-5-pve)
pve-manager: 5.1-43 (running version: 5.1-43/bdb08029)
pve-kernel-4.13.4-1-pve: 4.13.4-26
pve-kernel-4.13.13-2-pve: 4.13.13-33
pve-kernel-4.13.13-5-pve: 4.13.13-38
pve-kernel-4.13.13-3-pve: 4.13.13-34
libpve-http-server-perl: 2.0-8
lvm2: 2.02.168-pve6
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-19
qemu-server: 5.0-20
pve-firmware: 2.0-3
libpve-common-perl: 5.0-25
libpve-guest-common-perl: 2.0-14
libpve-access-control: 5.0-7
libpve-storage-perl: 5.0-17
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-3
pve-docs: 5.1-16
pve-qemu-kvm: 2.9.1-6
pve-container: 2.0-18
pve-firewall: 3.0-5
pve-ha-manager: 2.0-4
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.1.1-2
lxcfs: 2.0.8-1
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.7.4-pve2~bpo9

Could you help me, please?
Thanks

 

[wolfgang]

Can you please send the syslog and the dmesg output.

 

[denos]

I was seeing those errors intermittently under the 4.13 kernel line. I haven't seen any under the new testing kernel line: pve-kernel-4.15.

 

[decibel83]

I was seeing those errors intermittently under the 4.13 kernel line. I haven't seen any under the new testing kernel line: pve-kernel-4.15.

Do you know when pve-kernel-4.15 will be released?

 

[tom]

Do you know when pve-kernel-4.15 will be released?

See https://forum.proxmox.com/threads/4-15-based-test-kernel-for-pve-5-x-available.42097/