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Check for case of blkno already known to avoid unnecessary VOP_BMAP's.

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Submitted by:	John Dyson
This commit is contained in:
David Greenman 1995-04-04 02:10:17 +00:00
parent 6824b322b1
commit bb2d12a636
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=7613
1 changed files with 2 additions and 1 deletions
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3
sys/kern/vfs_cluster.c
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@ -33,7 +33,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_cluster.c 8.7 (Berkeley) 2/13/94
* $Id: vfs_cluster.c,v 1.13 1995/03/16 18:12:48 bde Exp $
* $Id: vfs_cluster.c,v 1.14 1995/03/19 13:28:54 davidg Exp $
*/
#include <sys/param.h>
@ -439,6 +439,7 @@ cluster_write(bp, filesize)
* existing cluster.
*/
if ((lbn + 1) * lblocksize != filesize &&
(bp->b_blkno == bp->b_lblkno) &&
(VOP_BMAP(vp, lbn, NULL, &bp->b_blkno, &maxclen) ||
bp->b_blkno == -1)) {
bawrite(bp);