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Index: share/man/man9/VOP_INACTIVE.9
===================================================================
--- share/man/man9/VOP_INACTIVE.9
+++ share/man/man9/VOP_INACTIVE.9
@@ -28,7 +28,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd July 27, 2014
+.Dd March 15, 2019
.Dt VOP_INACTIVE 9
.Os
.Sh NAME
@@ -50,13 +50,16 @@
.El
.Pp
.Fn VOP_INACTIVE
-is called when the kernel is no longer using the vnode.
+is usually called when the kernel is no longer using the vnode.
+However, there is no guarantee that it will be called at all, for example if
+the last reference was dropped while the vnode lock could not be upgraded
+to exclusive without sleeping.
This may be
because the reference count reaches zero or it may be that the
file system is being forcibly unmounted while there are open files.
-It can be used to reclaim space for
+It can be used to reclaim space on the last close of an
.Sq open but deleted
-files.
+file.
.Pp
.Fn VOP_RECLAIM
is called when a vnode is being reused for a different file system.

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