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.TH "BLK_QUEUE_MERGE_BVEC" "9" "17 July 2003" "" ""

.SH NAME
blk_queue_merge_bvec \- set a merge_bvec function for queue
.SH SYNOPSIS
.sp
\fB
.sp
void blk_queue_merge_bvec  (request_queue_t * \fIq\fB, merge_bvec_fn * \fImbfn\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIq\fB\fR
queue
.TP
\fB\fImbfn\fB\fR
merge_bvec_fn
.SH "DESCRIPTION"
.PP
Usually queues have static limitations on the max sectors or segments that
we can put in a request. Stacking drivers may have some settings that
are dynamic, and thus we have to query the queue whether it is ok to
add a new bio_vec to a bio at a given offset or not. If the block device
has such limitations, it needs to register a merge_bvec_fn to control
the size of bio's sent to it. Per default now merge_bvec_fn is defined for
a queue, and only the fixed limits are honored.
.SH "ABOUT THIS DOCUMENT"
.PP
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
.PP
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
.PP
For more details see the file COPYING in the source
distribution of Linux.
.PP
If you have comments on the formatting of this manpage, then please contact
Michael Still (mikal@stillhq.com).
.PP
This documentation was generated with kernel version 2.5.73.