From owner-cvs-src-old@FreeBSD.ORG  Thu Oct 30 21:58:44 2008
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 8FE12106567C
	for <cvs-src-old@freebsd.org>; Thu, 30 Oct 2008 21:58:44 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org
	[IPv6:2001:4f8:fff6::29])
	by mx1.freebsd.org (Postfix) with ESMTP id 7D2028FC23
	for <cvs-src-old@freebsd.org>; Thu, 30 Oct 2008 21:58:44 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.14.3/8.14.3) with ESMTP id m9ULwijG022402
	for <cvs-src-old@freebsd.org>; Thu, 30 Oct 2008 21:58:44 GMT
	(envelope-from rwatson@repoman.freebsd.org)
Received: (from svn2cvs@localhost)
	by repoman.freebsd.org (8.14.3/8.14.3/Submit) id m9ULwiIL022401
	for cvs-src-old@freebsd.org; Thu, 30 Oct 2008 21:58:44 GMT
	(envelope-from rwatson@repoman.freebsd.org)
Message-Id: <200810302158.m9ULwiIL022401@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: svn2cvs set sender to
	rwatson@repoman.freebsd.org using -f
From: Robert Watson <rwatson@FreeBSD.org>
Date: Thu, 30 Oct 2008 21:58:39 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/security/audit audit_pipe.c
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: Thu, 30 Oct 2008 21:58:44 -0000

rwatson     2008-10-30 21:58:39 UTC

  FreeBSD src repository

  Modified files:
    sys/security/audit   audit_pipe.c 
  Log:
  SVN rev 184488 on 2008-10-30 21:58:39Z by rwatson
  
  Break out single audit_pipe_mtx into two types of locks: a global rwlock
  protecting the list of audit pipes, and a per-pipe mutex protecting the
  queue.
  
  Likewise, replace the single global condition variable used to signal
  delivery of a record to one or more pipes, and add a per-pipe condition
  variable to avoid spurious wakeups when event subscriptions differ
  across multiple pipes.
  
  This slightly increases the cost of delivering to audit pipes, but should
  reduce lock contention in the presence of multiple readers as only the
  per-pipe lock is required to read from a pipe, as well as avoid
  overheading when different pipes are used in different ways.
  
  MFC after:      2 months
  Sponsored by:   Apple, Inc.
  
  Revision  Changes    Path
  1.19      +127 -83   src/sys/security/audit/audit_pipe.c