From owner-cvs-src-old@FreeBSD.ORG  Tue Dec  8 23:34:51 2009
Return-Path: <owner-cvs-src-old@FreeBSD.ORG>
Delivered-To: cvs-src-old@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 7F66D106568B
	for <cvs-src-old@freebsd.org>; Tue,  8 Dec 2009 23:34:51 +0000 (UTC)
	(envelope-from mav@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id 6D0708FC17
	for <cvs-src-old@freebsd.org>; Tue,  8 Dec 2009 23:34:51 +0000 (UTC)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id nB8NYpC9086763
	for <cvs-src-old@freebsd.org>; Tue, 8 Dec 2009 23:34:51 GMT
	(envelope-from mav@repoman.freebsd.org)
Received: (from svn2cvs@localhost)
	by repoman.freebsd.org (8.14.3/8.14.3/Submit) id nB8NYpfu086762
	for cvs-src-old@freebsd.org; Tue, 8 Dec 2009 23:34:51 GMT
	(envelope-from mav@repoman.freebsd.org)
Message-Id: <200912082334.nB8NYpfu086762@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to
	mav@repoman.freebsd.org using -f
From: Alexander Motin <mav@FreeBSD.org>
Date: Tue, 8 Dec 2009 23:34:34 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: RELENG_7
Subject: cvs commit: src/sys/geom/mirror g_mirror.c g_mirror.h
X-BeenThere: cvs-src-old@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: **OBSOLETE** CVS commit messages for the src tree
	<cvs-src-old.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src-old>,
	<mailto:cvs-src-old-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src-old>
List-Post: <mailto:cvs-src-old@freebsd.org>
List-Help: <mailto:cvs-src-old-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src-old>,
	<mailto:cvs-src-old-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 08 Dec 2009 23:34:51 -0000

mav         2009-12-08 23:34:34 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/geom/mirror      g_mirror.c g_mirror.h 
  Log:
  SVN rev 200286 on 2009-12-08 23:34:34Z by mav
  
  MFC r200086:
  Change 'load' balancing mode algorithm:
  - Instead of measuring last request execution time for each drive and
  choosing one with smallest time, use averaged number of requests, running
  on each drive. This information is more accurate and timely. It allows to
  distribute load between drives in more even and predictable way.
  - For each drive track offset of the last submitted request. If new request
  offset matches previous one or close for some drive, prefer that drive.
  It allows to significantly speedup simultaneous sequential reads.
  
  PR:             kern/113885
  
  Revision  Changes    Path
  1.93.2.1  +24 -28    src/sys/geom/mirror/g_mirror.c
  1.24.2.1  +2 -2      src/sys/geom/mirror/g_mirror.h