From owner-freebsd-current@FreeBSD.ORG  Fri Jul  9 17:25:13 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id AB1B616A4CE; Fri,  9 Jul 2004 17:25:13 +0000 (GMT)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
	[128.208.78.105])	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 8B0E443D39; Fri,  9 Jul 2004 17:25:13 +0000 (GMT)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (localhost [127.0.0.1])
	i69HPCoe011132;	Fri, 9 Jul 2004 10:25:12 -0700 (PDT)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)i69HPB4u011131;
	Fri, 9 Jul 2004 10:25:11 -0700 (PDT)	(envelope-from sgk)
Date: Fri, 9 Jul 2004 10:25:11 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Jon Noack <noackjr@alumni.rice.edu>
Message-ID: <20040709172511.GA10540@troutmask.apl.washington.edu>
References: <20040705184940.GA2651@tybalt.greiner.local>
	<200407081317.53981.jhb@FreeBSD.org>
	<20040709111955.2901ce5b.taku@tackymt.homeip.net>
	<200407091315.16899.jhb@FreeBSD.org> <40EED38D.9010903@alumni.rice.edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <40EED38D.9010903@alumni.rice.edu>
User-Agent: Mutt/1.4.1i
cc: Taku YAMAMOTO <taku@tackymt.homeip.net>
cc: freebsd-current@freebsd.org
Subject: Re: Native preemption is the culprit [was Re: today's CURRENT
	lockups]
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 09 Jul 2004 17:25:13 -0000

On Fri, Jul 09, 2004 at 12:19:09PM -0500, Jon Noack wrote:
> On 07/09/04 12:15, John Baldwin wrote:
> >My test machine is not a true SMP machine either, just HTT.  It has been 
> >running a -j 256 worldloop overnight with no problems, so I committed a 
> >slightly modified version of the patch yesterday.
> 
> Did you test with a UP kernel?  After your latest commit I have been 
> experiencing regular hard locks on my pre-HTT P4 machine.  Backing out 
> rev. 1.114 of sched_ule.c fixes it.  See my previous message (Re: 
> FreeBSD keeps hanging......):
> http://docs.freebsd.org/cgi/mid.cgi?40EECC49.3070501

I've tested it on a UP kernel (HTT enabled, ACPI disabled,
APIC enabled, ULE).   Appears to work fine.

-- 
Steve