svn commit: r295998 - head/share/man/man9
Konstantin Belousov
kib at FreeBSD.org
Wed Feb 24 20:04:43 UTC 2016
Author: kib
Date: Wed Feb 24 20:04:41 2016
New Revision: 295998
URL: https://svnweb.freebsd.org/changeset/base/295998
Log:
Remove references to Giant in the description of vrele(9). Add notes
about vnode lock and sleeping.
Reported by: julian
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Modified:
head/share/man/man9/vrele.9
Modified: head/share/man/man9/vrele.9
==============================================================================
--- head/share/man/man9/vrele.9 Wed Feb 24 20:02:58 2016 (r295997)
+++ head/share/man/man9/vrele.9 Wed Feb 24 20:04:41 2016 (r295998)
@@ -29,7 +29,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd November 20, 2010
+.Dd February 24, 2015
.Dt VRELE 9
.Os
.Sh NAME
@@ -81,9 +81,11 @@ If the
.Va v_usecount
field of the non-doomed vnode reaches zero, then it will be inactivated
and placed on the free list.
-Since the functions might need to call VOPs for the vnode, the
-.Va Giant
-mutex should be conditionally locked around the call.
+.Pp
+The
+.Fn vrele
+function may lock the vnode.
+All three functions may sleep.
.Pp
The hold count for the vnode is always greater or equal to the usecount.
Non-forced unmount fails when mount point owns a vnode that has non-zero
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