info on process holding exclusive lock

[badarisj]

folks,

any recommendations for a module that has facilities to
share a file across multiple processes on multiple host machines?
the file is an nfs file (since it is accessible from different hosts).

also i am looking for the module in question to provide info
on which process is holding the exclusive lock when a given
process can NOT get hold of an exclusive lock.

i have checked the LockFile::Simple. it looks ok but wanted a bit more
functionality
such as giving info on process holding lock etc.

thanks,
-badari