[Linux-HA] HA-NFS and POSIX locks, unable to umount?

[Jeff Layton]

On Thu, 2004-05-27 at 12:36, Alan Robertson wrote:
> This is a known bug in NFS.  At least, it's known to us ;-)
> 
> The solution is to reboot the machine (sorry!).  Starting with 1.2.1, this 
> should happen automatically when the Filesystem stop command fails
> 
> This problem and a couple of other related ones regarding locking are 
> documented here...
> 
> 	http://wiki.trick.ca/linux-ha/HaNFS

Actually, good news! I posted this same problem to the linux-nfs mailing
list and got a fix for it. The trick is to send a SIGKILL to the 'lockd'
kernel thread. This tells lockd to release all of its locks. Once I did
this I was able to unmount the filesystem, even if a client has a
current POSIX lock on the file.

That might be good info to add to the FAQ above...

Cheers,
-- 
Jeff Layton <jtlayton at poochiereds.net>