[Linux-cluster] umount hang

[Patrick Caulfield]

On Tue, Nov 23, 2004 at 11:50:23AM +0800, David Teigland wrote:
> 
> On Mon, Nov 22, 2004 at 12:44:07PM -0800, Daniel McNeil wrote:
> 
> > The full stack traces are available here:
> > http://developer.osdl.org/daniel/gfs_umount_hang/
> 
> Thanks, it's evident that the dlm became "stuck" on the node that's not
> doing the umount.  All the hung processes are blocked on the dlm's
> "in_recovery" lock. 

There also seems to be a GFS process with a failed "down_write" in dlm_unlock
which might be a clue. It's not the in_recovery lock because that's only held
for read during normal locking operations so it must be either the res_lock or
the ls_unlock_sem. odd as those are normally only held for very short time
periods.

-- 

patrick