svn commit: r260236 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Fri Jan  3 18:44:37 2014
New Revision: 260236
URL: http://svnweb.freebsd.org/changeset/base/260236

Log:
  In dmu_zfetch_stream_reclaim() replace division with multiplication and
  move it out of the loop and lock.

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c	Fri Jan  3 18:36:19 2014	(r260235)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c	Fri Jan  3 18:44:37 2014	(r260236)
@@ -604,14 +604,16 @@ static zstream_t *
 dmu_zfetch_stream_reclaim(zfetch_t *zf)
 {
 	zstream_t	*zs;
+	clock_t		ticks;
 
+	ticks = zfetch_min_sec_reap * hz;
 	if (! rw_tryenter(&zf->zf_rwlock, RW_WRITER))
 		return (0);
 
 	for (zs = list_head(&zf->zf_stream); zs;
 	    zs = list_next(&zf->zf_stream, zs)) {
 
-		if (((ddi_get_lbolt() - zs->zst_last)/hz) > zfetch_min_sec_reap)
+		if (ddi_get_lbolt() - zs->zst_last > ticks)
 			break;
 	}