[PVE-User] Kernel panics when using OpenVSwitch bridges (Proxmox VE 7.3)

[DERUMIER, Alexandre]

bridge performance is same (without the bugs).


The only was to have better performance with ovs, is to implemented
dpdk + vhost-user nic, and it's not implemented in proxmox currently.

Le mercredi 31 mai 2023 à 14:28 +0200, Benjamin Hofer a écrit :
> Hello community,
> 
> we're using OpenVSwitch bridges on a productive Proxxmox 7.3 cluster
> with 4
> nodes (different hardware). Some weeks ago, a sudden reboot happened
> on one
> of the cluster nodes. Further analysis showed that we had  kernel
> panics /
> CPU stalls which seem to be related to OpenVSwitch. After more
> analysis, we
> found out that we're able to reliably reproduce the OVS related
> kernel
> panic jst by restarting running LXC containers with network
> interfaces. The
> behaviour could be reproduced on all our nodes. As these nodes are
> quite
> different in their hardware specifications, we assume that it's
> caused by
> some software-related (OVS) bug.
> 
> The kernel panics do NOT occur when switching to linux bridged on a
> node.
> 
> See kernel log extract attached.
> 
> Did someone have a similar behaviour?
> What experiences do you have with linux bridges compared to OVS
> bridges
> regarding network performance?
> 
> We could do without OVS features but must rely on good enough
> performance.
> 
> System:
> pveversion: pve-manager/7.3-6/723bb6ec (running kernel: 5.15.102-1-
> pve)
> OVS 2.15.0
> 
> Thank you in advance.
> 
> All the best
> Benjamin
> _______________________________________________
> pve-user mailing list
> pve-user at lists.proxmox.com
> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user
>