[Linux-cluster] mount hang in kcl_join_service

[David Teigland]

On Wed, Feb 16, 2005 at 03:39:37PM -0800, Daniel McNeil wrote:
> I have not been able to get my tests to run for more than
> 1 day for the last several tries.  This time my test hung
> during mount in kcl_join_service().  My test does mount and umount 
> several times for each test run.  This time it hung on the
> 22nd test run.  It looks like it was starting a 3node test
> where a gfs file system is mounted on all 3 nodes and then
> does a umount/mount 1 node at a time.  So this should have
> done an umount on cl031 and then hung on a mount on cl031
> with cl030 and cl032 having the gfs file system still mounted.

> A bunch of info is available here:
> http://developer.osdl.org/daniel/GFS/test.11feb2005/

I've looked through it and can't pinpoint the problem.  Next
time could you also collect /proc/cluster/lock_dlm/debug and
/proc/cluster/dlm_debug ?

I've set up a similar but simplified test on both of my test
clusters (a 2-node and a 7-node).  I can't dedicate these
machines for a full 1-2 day stretch this until the weekend,
though.  My test is a loop around:

- on each node sequentially: unmount/mount gfs
- on each node sequentially: run some load for a couple minutes

-- 
Dave Teigland  <teigland at redhat.com>