From owner-svn-src-head@FreeBSD.ORG  Tue Jul 20 05:22:14 2010
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 66394106564A;
	Tue, 20 Jul 2010 05:22:14 +0000 (UTC) (envelope-from mm@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 51A008FC15;
	Tue, 20 Jul 2010 05:22:14 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o6K5MEM5096562;
	Tue, 20 Jul 2010 05:22:14 GMT (envelope-from mm@svn.freebsd.org)
Received: (from mm@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id o6K5MEC2096560;
	Tue, 20 Jul 2010 05:22:14 GMT (envelope-from mm@svn.freebsd.org)
Message-Id: <201007200522.o6K5MEC2096560@svn.freebsd.org>
From: Martin Matuska <mm@FreeBSD.org>
Date: Tue, 20 Jul 2010 05:22:14 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r210282 -
	head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
	<svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 20 Jul 2010 05:22:14 -0000

Author: mm
Date: Tue Jul 20 05:22:14 2010
New Revision: 210282
URL: http://svn.freebsd.org/changeset/base/210282

Log:
  To improve latency, lower default vfs.zfs.vdev.max_pending from 35 to 10
  
  OpenSolaris onnv changeset (partial):	10801:e0bf032e8673
  
  Approved by:	pjd, delphij (mentor)
  Obtained from:	OpenSolaris (Bug ID 6891731)
  MFC after:	1 week

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

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c	Tue Jul 20 05:16:10 2010	(r210281)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c	Tue Jul 20 05:22:14 2010	(r210282)
@@ -38,7 +38,7 @@
  * of i/os pending to each device (before it starts ramping up to
  * max_pending).
  */
-int zfs_vdev_max_pending = 35;
+int zfs_vdev_max_pending = 10;
 int zfs_vdev_min_pending = 4;
 
 /* deadline = pri + (LBOLT >> time_shift) */