Machine unresponsive with cache_lock: blocked on... message

[Francois Tigeot <ftigeot@xxxxxxxxxxxx>]

My backup machine has been rendered unresponsive.

It is a Core 2 Duo / 2GB system running DragonFly v2.5.1.766.g3da46-DEVELOPMENT
(from 2010-02-11)

I think it was after a rsync run. There were many rsync error messages
on the console followed by this kernel message:

[diagnostic] cache_lock : blocked on 0xe920a868 "spwd.db"

The machine did respond to ping, but nothing else:
- no nfs traffic
- no ssh response
- nothing when pressing keys on the console.

I managed to get a core dump via ctl-alt-esc; it has been put online
at http://www.wolfpond.org/crash.dfly/

-- 
Francois Tigeot