From owner-freebsd-current@FreeBSD.ORG Fri Jul 9 17:54:02 2004 Return-Path: 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 CD60B16A4CF for ; Fri, 9 Jul 2004 17:54:02 +0000 (GMT) Received: from smtp003.bizmail.yahoo.com (smtp003.bizmail.yahoo.com [216.136.130.195]) by mx1.FreeBSD.org (Postfix) with SMTP id B5CEB43D53 for ; Fri, 9 Jul 2004 17:54:02 +0000 (GMT) (envelope-from noackjr@alumni.rice.edu) Received: from unknown (HELO optimator.noacks.org) (noackjr@supercrime.org@70.240.179.20 with login) by smtp003.bizmail.yahoo.com with SMTP; 9 Jul 2004 17:54:02 -0000 Received: from localhost (localhost [127.0.0.1]) by optimator.noacks.org (Postfix) with ESMTP id 91624618F; Fri, 9 Jul 2004 12:54:01 -0500 (CDT) Received: from optimator.noacks.org ([127.0.0.1]) by localhost (optimator.noacks.org [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 03590-02-4; Fri, 9 Jul 2004 12:54:00 -0500 (CDT) Received: from compgeek.noacks.org (compgeek [192.168.1.10]) by optimator.noacks.org (Postfix) with ESMTP id 71D836157; Fri, 9 Jul 2004 12:54:00 -0500 (CDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by compgeek.noacks.org (8.12.11/8.12.11) with ESMTP id i69Hrsp6010792; Fri, 9 Jul 2004 12:53:54 -0500 (CDT) (envelope-from noackjr@alumni.rice.edu) Message-ID: <40EEDBB1.6090903@alumni.rice.edu> Date: Fri, 09 Jul 2004 12:53:53 -0500 From: Jon Noack User-Agent: Mozilla Thunderbird 0.7.1 (X11/20040629) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Steve Kargl 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> <20040709172511.GA10540@troutmask.apl.washington.edu> In-Reply-To: <20040709172511.GA10540@troutmask.apl.washington.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at noacks.org cc: Taku YAMAMOTO 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 Reply-To: noackjr@alumni.rice.edu List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Jul 2004 17:54:02 -0000 On 07/09/04 12:25, Steve Kargl wrote: > 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. Perhaps it's just extraneous information, but if it's really a UP kernel (as in, no 'options SMP') then whether you have HTT enabled doesn't matter at all -- the kernel won't use it. Jon