[src/trunk]: src/share/man/man4 document BUFQ_READPRIO and BUFQ_PRIOCSCAN.

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cc6c2092c259
branches:  trunk
changeset: 581729:cc6c2092c259
user:      yamt <yamt%NetBSD.org@localhost>
date:      Sat Jun 04 06:52:35 2005 +0000

description:
document BUFQ_READPRIO and BUFQ_PRIOCSCAN.

diffstat:

 share/man/man4/options.4 |  18 ++++++++++++++----
 1 files changed, 14 insertions(+), 4 deletions(-)

diffs (47 lines):

diff -r 58f94097e6d3 -r cc6c2092c259 share/man/man4/options.4
--- a/share/man/man4/options.4  Sat Jun 04 06:07:01 2005 +0000
+++ b/share/man/man4/options.4  Sat Jun 04 06:52:35 2005 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: options.4,v 1.274 2005/05/04 02:39:19 augustss Exp $
+.\"    $NetBSD: options.4,v 1.275 2005/06/04 06:52:35 yamt Exp $
 .\"
 .\" Copyright (c) 1996
 .\"    Perry E. Metzger.  All rights reserved.
@@ -30,7 +30,7 @@
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .\"
-.Dd May 4, 2005
+.Dd Jun 4, 2005
 .Os
 .Dt OPTIONS 4
 .Sh NAME
@@ -990,9 +990,10 @@
 Increase lookup performance by maintaining in-core hash tables
 for large directories.
 .El
-.Ss Miscellaneous Options
+.Ss Buffer queue strategy options
 .Bl -ohang
-.It Cd options NEW_BUFQ_STRATEGY
+Following options enable alternative buffer queue strategies.
+.It Cd options BUFQ_READPRIO
 Enable experimental buffer queue strategy for disk I/O.
 In the default strategy, outstanding disk requests are ordered by
 sector number and sent to the disk, regardless of whether the
@@ -1026,6 +1027,15 @@
 Finally, the performance interaction of this option with ffs soft
 dependencies can be subtle, as that mechanism can drastically alter
 the workload for filesystem metadata writes.
+.It Cd options BUFQ_PRIOCSCAN
+Enable another experimental buffer queue strategy for disk I/O,
+Per-priority Cyclical scan.
+.It Cd options NEW_BUFQ_STRATEGY
+Synonym of
+.Em BUFQ_READPRIO .
+.El
+.Ss Miscellaneous Options
+.Bl -ohang
 .It Cd options LKM
 Enable loadable kernel modules.
 See