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note when VOP_GETPAGES updates number of pages pointed by 'count'.

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yamt 2003-06-19 14:36:14 +00:00
parent 7ebe0b8c4b
commit 4a8cf36294
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13
share/man/man9/vnodeops.9
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@ -1,4 +1,4 @@
.\" $NetBSD: vnodeops.9,v 1.23 2003/06/09 13:30:44 yamt Exp $
.\" $NetBSD: vnodeops.9,v 1.24 2003/06/19 14:36:14 yamt Exp $
.\"
.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -34,7 +34,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd June 6, 2003
.Dd June 19, 2003
.Dt VNODEOPS 9
.Os
.Sh NAME
@ -1397,9 +1397,16 @@ is offset in the file to start accessing and
is an array of VM pages.
The argument
.Fa count
specifies the number of pages to read.
points a variable that specifies the number of pages to read.
If the operation is successful zero is returned, otherwise an
appropriate error code is returned.
If PGO_LOCKED is specified in
.Em flags,
.Fn VOP_GETPAGES
might return less pages than requested.
In that case, a variable pointed by
.Em count
will be updated.
.Pp
This function is primarily used by the page-fault handing mechanism.
.It Fn VOP_PUTPAGES "vp" "offset" "len" "flags"