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Revision 1.5, Wed Aug 14 06:32:33 2013 UTC (10 years, 9 months ago) by jmc
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, OPENBSD_5_8_BASE, OPENBSD_5_8, OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5, HEAD
Changes since 1.4: +3 -3 lines 

no longer any need to quote macro lines with >9 args;
From: Jan Stary

.\"	$OpenBSD: vwakeup.9,v 1.5 2013/08/14 06:32:33 jmc Exp $
.\" Written by Jared Yanovich
.\" This file belongs to the public domain.
.Dd $Mdocdate: August 14 2013 $
.Dt VWAKEUP 9
.Os
.Sh NAME
.Nm vwakeup
.Nd update outstanding I/O count and do wakeup on a vnode
.Sh SYNOPSIS
.In sys/param.h
.In sys/vnode.h
.Ft void
.Fn vwakeup "struct vnode *vp"
.Sh DESCRIPTION
The
.Fn vwakeup
function updates the number of outstanding I/O operations on the target
vnode, stored in its
.Va v_numoutput
field.
If the target vnode has the
.Dv VBIOWAIT
flag set in its
.Va v_bioflag
field and has no outstanding I/O operations remaining, a
.Xr wakeup 9
is performed as well.
.Pp
The
.Fn vwakeup
function must be called at
.Xr splbio 9 .
.Sh SEE ALSO
.Xr panic 9 ,
.Xr splbio 9 ,
.Xr vnode 9 ,
.Xr vwaitforio 9 ,
.Xr wakeup 9
.Sh HISTORY
This document first appeared in
.Ox 3.7 .
.Sh CAVEATS
Calling
.Fn vwakeup
more times than the number of outstanding I/O operations will cause the
system to
.Xr panic 9 .