Decrement the usecount on a vnode.
- macOS 10.4+
The vnode whose usecount to drop.
vnode_rele() is called to relese a persistent reference on a vnode. Releasing the last usecount opens the door for a vnode to be reused as a new file; it also triggers a VNOP_INACTIVE call to the filesystem, though that will not happen immediately if there are outstanding iocount references.