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

[Alexandre DERUMIER]

Hi,
do you have any stack trace ?

Hopefully, I'm stil on 4.4.8 and no crash for me.

I have only 1 server running on 4.4.10, but without nfs (only rbd), and I don't have crash.

I have have seen any change for nfs in 4.4.9 and 4.4.10 changelog, so maybe it's NIC related
(they are 1 or 2 patch for infiniband)

https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.9
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.10
----- Mail original -----
De: "datanom.net" <mir at datanom.net>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Dimanche 3 Juillet 2016 20:58:40
Objet: [pve-devel] pve-kernel-4.4.10-1-pve woes

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. 

-- 
Hilsen/Regards 
Michael Rasmussen 

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