From owner-cvs-all Thu Jan 2 9:42:42 2003 Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E783F37B40D for ; Thu, 2 Jan 2003 09:42:36 -0800 (PST) Received: from mail.speakeasy.net (mail11.speakeasy.net [216.254.0.211]) by mx1.FreeBSD.org (Postfix) with ESMTP id 96DCE43ED8 for ; Thu, 2 Jan 2003 09:42:34 -0800 (PST) (envelope-from jhb@FreeBSD.org) Received: (qmail 31383 invoked from network); 2 Jan 2003 17:42:38 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail11.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 2 Jan 2003 17:42:38 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.12.6/8.12.6) with ESMTP id h02HgWUT060241; Thu, 2 Jan 2003 12:42:32 -0500 (EST) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.2 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Thu, 02 Jan 2003 12:42:38 -0500 (EST) From: John Baldwin To: Nate Lawson Subject: Re: cvs commit: src/sys/kern subr_smp.c Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, "David O'Brien" Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On 29-Dec-2002 Nate Lawson wrote: > On Sun, 29 Dec 2002, David O'Brien wrote: >> On Sat, Dec 28, 2002 at 03:53:00PM -0800, Nate Lawson wrote: >> > On Sat, 28 Dec 2002, Jake Burkholder wrote: >> > > Modified files: >> > > sys/kern subr_smp.c >> > > Log: >> > > Add a tunable kern.smp.disabled for disabling explicitly smp on an smp >> > > kernel. >> > > >> > > Revision Changes Path >> > > 1.171 +5 -1 src/sys/kern/subr_smp.c >> > >> > Would love to see this go into RELENG_4 (and 5.0 for that matter). This >> > would aid testing. >> >> That would only help Alpha wouldn't it? We don't have the ability to >> turn on and off SMP on i386. > > It's never been possible to turn on smp after boot on FreeBSD. This only > disables it at boot time and should work on every platform. > > I'm not sure what facility this would use on 4.x since it doesn't have > loader tunables. In any case, I'd like to see this in 5.0. It wouldn't work in 4.x because of the broken way (compile-time choice) we decide to use APICs or not. Alpha doesn't have SMP in 4.x, so that is irrelevant. -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message