[DRBD-user] Kernel panic from drdbadm on CentOS 6
Dominik.Epple at EMEA.NEC.COM
Mon Aug 15 16:38:21 CEST 2011
we are facing kernel panics with CentOS 6 (RHEL 6 compatible) with kernel version 2.6.32-71.29.1.el6.x86_64, drbd version 8.3.11 built from sources.
Some days ago David Coulson reported the same problem in a thread called "DRBD trace with RHEL6.1 upgrade". The last mail in the thread (Wed Aug 3 16:31:56 CEST 2011) has a screenshot with the call trace (http://i.imgur.com/cSOzV.png). Since I have no (easy) means of taking a screenshot of the call trace from my machine, I cannot give one here, but it is the very same problem with Process drbdadm and vfs_ioctl in the call trace, etc.
I cannot say, unfortunately, how to reproduce the panic. I was unable to found out a single event which triggers it reproducibly. But it seems that it is necessary that drbd runs under a cluster management system (pacemaker/corosync in my case).
Actions that can trigger those panics include:
* Starting the pacemaker drbd resource via "crm resource start <resourcename>"
* Restarting the cluster management system via "service corosync restart"
* Doing a "ifdown eth0; ifup eth0" for the interface drbd is run over
Since the other thread has no answer to this problem, I ask here again: Where does this panic come from? Is there a solution, patch, or workaround known?
Thanks and regards
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