[pve-devel] pve-kernel-4.4.10-1-pve woes

Michael Rasmussen mir at datanom.net
Sun Jul 3 20:58:40 CEST 2016

Hi all,

After facing problems with mysterious "crashes" of proxmox nodes I have
been doing some extensive tests this weekend. My tests have shown that
this kernel has introduced a regression concerning NFS. The problems is
must visible on Infiniband but Intel ethernet nics are also heart by
this regression.

How to reproduce:
Put a lot of load on a NFS mount like making backup, creating a CT or
creating a VM.

What will happen:
The nic(s) involved will stop passing traffic through and only way to
bring them back up is ifdown nic && ifup nic. Problem with this for NFS
mounts is that NFS in its default configuration will wait indefinitely
because of mount option 'hard' bringing the hole node down which can
only be resolved by a reboot of the node.

Because of this I have reverted to pve-kernel-4.4.8-1-pve which works
as expected.

Michael Rasmussen

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