Linux repositories inspector

VREF(9freebsd)

January 18, 2016

freebsd-manpages

Manual pages for a GNU/kFreeBSD system

NAME

vref, vrefl - increment the use count for a vnode

SYNOPSIS


.In sys/param.h
.In sys/vnode.h void vref struct vnode *vp void vrefl struct vnode *vp

DESCRIPTION

Increment the v_usecount field of a vnode.
vp the vnode to increment
Each vnode maintains a reference count of how many parts of the system are using the vnode. This allows the system to detect when a vnode is no longer being used and can be safely recycled for a different file.
Any code in the system which is using a vnode (e.g. during the operation of some algorithm or to store in a data structure) should call vref or vrefl.
vref locks the vnode interlock while vrefl expects the interlock to already be held.

AUTHORS

This manual page was written by
.An Doug Rabson .
⇧ Top