If you are reading at the "do_vfs_lock: VFS is out of sync with lock manager" messages at your screen or in your log file,
According to RedHat Site,
The message will be printed whenever there is locking contention (two or more processes trying to lock the same file) and the mount had nolock specified.
The RHEL-5 code prints the message unconditionally, while on the
upstream code it is a debugging message, so it won't be seen on normal
Do take a look at your /etc/fstab and the mounting option. You should remove the "nolock" options