From owner-cvs-src@FreeBSD.ORG  Tue Jul  3 18:37:06 2007
Return-Path: <owner-cvs-src@FreeBSD.ORG>
X-Original-To: cvs-src@FreeBSD.org
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id C143516A41F;
	Tue,  3 Jul 2007 18:37:06 +0000 (UTC) (envelope-from jhb@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [69.147.83.41])
	by mx1.freebsd.org (Postfix) with ESMTP id 9AE1513C43E;
	Tue,  3 Jul 2007 18:37:06 +0000 (UTC) (envelope-from jhb@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.8/8.13.8) with ESMTP id l63Ib64i002104;
	Tue, 3 Jul 2007 18:37:06 GMT (envelope-from jhb@repoman.freebsd.org)
Received: (from jhb@localhost)
	by repoman.freebsd.org (8.13.8/8.13.8/Submit) id l63Ib6bY002103;
	Tue, 3 Jul 2007 18:37:06 GMT (envelope-from jhb)
Message-Id: <200707031837.l63Ib6bY002103@repoman.freebsd.org>
From: John Baldwin <jhb@FreeBSD.org>
Date: Tue, 3 Jul 2007 18:37:06 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/kern subr_smp.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 03 Jul 2007 18:37:06 -0000

jhb         2007-07-03 18:37:06 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             subr_smp.c 
  Log:
  Tweak the low-level MI SMP code some:
  - Use cpu_spinwait() in the spin loops in stop_cpus(), restart_cpus(), and
    smp_rendezvous_action().
  - Remove unneeded acq memory barriers in stop_cpus(), restart_cpus(), and
    smp_rendezvous_action().
  - Add an additional synch point in smp_rendezvous() to ensure that all the
    CPUs will always see an up-to-date value of smp_rv_setup_func.
  
  Reviewed by:    attilio
  Approved by:    re (kensmith)
  Tested on:      alpha, amd64, i386, sparc64 SMP (for several years)
  
  Revision  Changes    Path
  1.200     +23 -11    src/sys/kern/subr_smp.c