[pve-devel] need help to debug random host freeze on multiple hosts

[Alexandre DERUMIER]

>>What about magic sysrq ? Does that still react? 

Keyboard not working.
Also my dell hardware has watchdog, and it's not responding. So it's really frozen.

>>Screen frozen or black? 

screen frozen

----- Mail original -----
De: "Stefan Priebe" <s.priebe at profihost.ag>
À: "aderumier" <aderumier at odiso.com>
Cc: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Dimanche 28 Décembre 2014 18:51:33
Objet: Re: [pve-devel] need help to debug random host freeze on multiple hosts

What about magic sysrq ? Does that still react? Screen frozen or black? 

Stefan 
Excuse my typo s ent from my mobile phone. 

Am 28.12.2014 um 17:37 schrieb Alexandre DERUMIER < aderumier at odiso.com >: 




Hi, 

I have random host freeze since around 1 week, 

all hosts are opteron 63XX or 61XX. 

kernel is pve-kernel-3.10-4 or pve-kernel-3.10-5, qemu 2.1. 

They were all fine since months. 

I have also tried last rhel 7.1beta kernel with no success. 


I really don't known how to debug that, because the system freeze, and I don't have any kernel panic output in display or serial. 


Can somebody help me to add something to have debug output ? 

I have see some doc about kdump 
http://wiki.incloudus.com/display/DOC/Debian+-+Kdump 
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s2-kdump-configuration-cli.html 

Is it the best option I have to have some debug info ? 





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