From owner-svn-src-all@FreeBSD.ORG  Sun Jan 15 16:57:18 2012
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E9C06106567B;
	Sun, 15 Jan 2012 16:57:18 +0000 (UTC)
	(envelope-from nwhitehorn@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id D89098FC0A;
	Sun, 15 Jan 2012 16:57:18 +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 q0FGvIAN091659;
	Sun, 15 Jan 2012 16:57:18 GMT
	(envelope-from nwhitehorn@svn.freebsd.org)
Received: (from nwhitehorn@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q0FGvIh1091657;
	Sun, 15 Jan 2012 16:57:18 GMT
	(envelope-from nwhitehorn@svn.freebsd.org)
Message-Id: <201201151657.q0FGvIh1091657@svn.freebsd.org>
From: Nathan Whitehorn <nwhitehorn@FreeBSD.org>
Date: Sun, 15 Jan 2012 16:57:18 +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: r230139 - head/sys/powerpc/ps3
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: Sun, 15 Jan 2012 16:57:19 -0000

Author: nwhitehorn
Date: Sun Jan 15 16:57:18 2012
New Revision: 230139
URL: http://svn.freebsd.org/changeset/base/230139

Log:
  Now that we can tolerate LPAR context switches on the PS3 hypervisor, going
  to hypervisor-idle on both threads will not hang the kernel.

Modified:
  head/sys/powerpc/ps3/platform_ps3.c

Modified: head/sys/powerpc/ps3/platform_ps3.c
==============================================================================
--- head/sys/powerpc/ps3/platform_ps3.c	Sun Jan 15 14:03:05 2012	(r230138)
+++ head/sys/powerpc/ps3/platform_ps3.c	Sun Jan 15 16:57:18 2012	(r230139)
@@ -247,16 +247,6 @@ ps3_real_maxaddr(platform_t plat)
 static void
 ps3_cpu_idle(void)
 {
-	static volatile int pausing = 0;
-
-	/*
-	 * XXX: It appears that the PS3 can livelock if both threads
-	 * call lv1_pause(0) simultaneously.
-	 */
-	if (!atomic_cmpset_int(&pausing, 0, 1))
-		return;
-
 	lv1_pause(0);
-	pausing = 0;
 }