[Linux-cluster] disabling DLM and GFS kernel modules

[David Teigland]

On Tue, Sep 18, 2007 at 09:34:45AM -0500, Chris Harms wrote:
> It said something about an out of memory condition.   This was logged 
> just prior to where it would have panicked:
> 
> groupd[9639]: found uncontrolled kernel object rgmanager in /sys/kernel/dlm
> groupd[9639]: local node must be reset to clear 1 uncontrolled instances 
> of gfs and/or dlm
> openais[9625]: [CMAN ] cman killed by node 1 because we were killed by 
> cman_tool or other application
> fenced[9647]: cman_init error 0 111
> dlm_controld[9653]: cman_init error 0 111
> gfs_controld[9659]: cman_init error 111

These messages mean that the userspace cluster software all exited for
some unknown reason, leaving behind a dlm lockspace (in the kernel) from
rgmanager.  At this point, you needed to reboot the machine, but instead
you restarted the userspace cluster software, which rightly complained
that you hadn't rebooted the machine, and refused to do operate.

This probably doesn't help, though, because it doesn't tell us anything
about the original problem(s) you had.  The original problem(s) probably
caused the cluster software to exit the first time, and was probably
related to the runaway processes.


> There were 2 runaway processes related to GFS / DLM before I tried to 
> shut it down.  We had not encountered any issues like this until now.  
> The only changes to our setup were a superficial change to some cluster 
> services, and an upgrade of the DRBD kernel module.
> 
> Kevin Anderson wrote:
> >On Mon, 2007-09-17 at 17:50 -0500, Chris Harms wrote:
> >>Is there an easy way to disable GFS and related kernel modules if one 
> >>does not need GFS?  We are running the 5.1 Beta 1 version of the cluster 
> >>and had a mysterious crash of the cluster suite.  There were issues with 
> >>the GFS and dlm modules.  The kernel panicked on shutdown.
> >>
> >>    
> >Do you have any details on the panic?
> >
> >Kevin
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