1.\" $OpenBSD: vwakeup.9,v 1.3 2007/05/31 19:20:01 jmc Exp $ 2.\" Written by Jared Yanovich 3.\" This file belongs to the public domain. 4.Dd $Mdocdate: May 31 2007 $ 5.Dt VWAKEUP 9 6.Os 7.Sh NAME 8.Nm vwakeup 9.Nd "update outstanding I/O count and do wakeup on a vnode" 10.Sh SYNOPSIS 11.Fd #include <sys/param.h> 12.Fd #include <sys/vnode.h> 13.Ft void 14.Fn vwakeup "struct vnode *vp" 15.Sh DESCRIPTION 16The 17.Fn vwakeup 18function updates the number of outstanding I/O operations on the target 19vnode, stored in its 20.Va v_numoutput 21field. 22If the target vnode has the 23.Dv VBIOWAIT 24flag set in its 25.Va v_bioflag 26field and has no outstanding I/O operations remaining, a 27.Xr wakeup 9 28is performed as well. 29.Pp 30The 31.Fn vwakeup 32function must be called at 33.Xr splbio 9 . 34.Sh SEE ALSO 35.Xr panic 9 , 36.Xr splbio 9 , 37.Xr vnode 9 , 38.Xr vwaitforio 9 , 39.Xr wakeup 9 40.Sh HISTORY 41This document first appeared in 42.Ox 3.7 . 43.Sh CAVEATS 44Calling 45.Fn vwakeup 46more times than the number of outstanding I/O operations will cause the 47system to 48.Xr panic 9 . 49