[issue1972] panic: lockmgr: locking against myself - live dedup

[Matthew Dillon]

:Using master from today on UP system
:I got panic after enabling live dedup (sysctl vfs.hammer.live_dedup=1).
:
:This is on a NFS server; panic happens sometimes almost immediately,
:mayby when syncer runs, other times it takes 20 minutes.
:
:Coredump uploaded to leaf as *.11.
:
: -thomas

    Yah, this is a known bug.  For now you also have to turn on this
    sysctl in addition to vfs.hammer.live_dedup if you want to play
    with live dedup:

    sysctl vfs.hammer.double_buffer=1

    Which will bypass the problem for now.
 
						-Matt