From owner-cvs-src-old@FreeBSD.ORG  Sun Apr 10 03:50:16 2011
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 6FA55106578D
	for <cvs-src-old@freebsd.org>; Sun, 10 Apr 2011 03:50:16 +0000 (UTC)
	(envelope-from jeff@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id E31838FC0C
	for <cvs-src-old@freebsd.org>; Sun, 10 Apr 2011 03:50:07 +0000 (UTC)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.4/8.14.4) with ESMTP id p3A3o7EC089506
	for <cvs-src-old@freebsd.org>; Sun, 10 Apr 2011 03:50:07 GMT
	(envelope-from jeff@repoman.freebsd.org)
Received: (from svn2cvs@localhost)
	by repoman.freebsd.org (8.14.4/8.14.4/Submit) id p3A3o71e089505
	for cvs-src-old@freebsd.org; Sun, 10 Apr 2011 03:50:07 GMT
	(envelope-from jeff@repoman.freebsd.org)
Message-Id: <201104100350.p3A3o71e089505@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to
	jeff@repoman.freebsd.org using -f
From: Jeff Roberson <jeff@FreeBSD.org>
Date: Sun, 10 Apr 2011 03:49:53 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/ufs/ffs ffs_softdep.c softdep.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: Sun, 10 Apr 2011 03:50:16 -0000

jeff        2011-04-10 03:49:53 UTC

  FreeBSD src repository

  Modified files:
    sys/ufs/ffs          ffs_softdep.c softdep.h 
  Log:
  SVN rev 220511 on 2011-04-10 03:49:53Z by jeff
  
  Fix a long standing SUJ performance problem:
  
   - Keep a hash of indirect blocks that have recently been freed and are
     still referenced in the journal.
   - Lookup blocks in this hash before forcing a new block write to wait on
     the journal entry to hit the disk.  This is only necessary to avoid
     confusion between old identities as indirects and new identities as
     file blocks.
   - Don't free jseg structures until the journal has written a record that
     invalidates it.  This keeps the indirect block information around for
     as long as is required to be safe.
   - Force an empty journal block write when required to flush out stale
     journal data that is simply waiting for the oldest valid sequence
     number to advance beyond it.
  
  Revision  Changes    Path
  1.273     +212 -56   src/sys/ufs/ffs/ffs_softdep.c
  1.26      +3 -1      src/sys/ufs/ffs/softdep.h