From owner-svn-src-all@FreeBSD.ORG  Thu Jun 23 16:21:43 2011
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (unknown [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6E39B106566B;
	Thu, 23 Jun 2011 16:21:43 +0000 (UTC)
	(envelope-from marcel@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [69.147.83.44])
	by mx1.freebsd.org (Postfix) with ESMTP id 5E71C8FC21;
	Thu, 23 Jun 2011 16:21:43 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id p5NGLhbI006637;
	Thu, 23 Jun 2011 16:21:43 GMT (envelope-from marcel@svn.freebsd.org)
Received: (from marcel@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id p5NGLhF2006635;
	Thu, 23 Jun 2011 16:21:43 GMT (envelope-from marcel@svn.freebsd.org)
Message-Id: <201106231621.p5NGLhF2006635@svn.freebsd.org>
From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Thu, 23 Jun 2011 16:21:43 +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: r223478 - head/sys/ia64/ia64
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 23 Jun 2011 16:21:43 -0000

Author: marcel
Date: Thu Jun 23 16:21:43 2011
New Revision: 223478
URL: http://svn.freebsd.org/changeset/base/223478

Log:
  Unblock the outgoing thread after we performed pmap_switch() to
  switch the region registers. pmap_switch() returns the pmap for
  which the region register are currently programmed, which needs
  to be re-programmed on the CPU the ougoing thread gets switched
  in.  This change does not noticibly change anything or fix known
  bugs, but does give me a warm fuzzy feeling by being more
  correct.

Modified:
  head/sys/ia64/ia64/machdep.c

Modified: head/sys/ia64/ia64/machdep.c
==============================================================================
--- head/sys/ia64/ia64/machdep.c	Thu Jun 23 15:53:17 2011	(r223477)
+++ head/sys/ia64/ia64/machdep.c	Thu Jun 23 16:21:43 2011	(r223478)
@@ -470,12 +470,12 @@ cpu_switch(struct thread *old, struct th
 	if (PCPU_GET(fpcurthread) == old)
 		old->td_frame->tf_special.psr |= IA64_PSR_DFH;
 	if (!savectx(oldpcb)) {
-		atomic_store_rel_ptr(&old->td_lock, mtx);
-
 		newpcb = new->td_pcb;
 		oldpcb->pcb_current_pmap =
 		    pmap_switch(newpcb->pcb_current_pmap);
 
+		atomic_store_rel_ptr(&old->td_lock, mtx);
+
 #if defined(SCHED_ULE) && defined(SMP)
 		while (atomic_load_acq_ptr(&new->td_lock) == &blocked_lock)
 			cpu_spinwait();