From owner-cvs-src@FreeBSD.ORG Thu Dec 14 17:16:13 2006 Return-Path: X-Original-To: cvs-src@freebsd.org Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5809616A839 for ; Thu, 14 Dec 2006 17:16:13 +0000 (UTC) (envelope-from zombyfork@gmail.com) Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.229]) by mx1.FreeBSD.org (Postfix) with ESMTP id 62B764403F for ; Thu, 14 Dec 2006 17:01:51 +0000 (GMT) (envelope-from zombyfork@gmail.com) Received: by wr-out-0506.google.com with SMTP id i28so265291wra for ; Thu, 14 Dec 2006 09:03:25 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:references; b=td3ep1fonRjLTjzDlfY/8ofTNyEYkuRvfH7QNDiBjQ9A8JjcAdmuSNuNIOKBebA03H4R41o/anGWaCP17ttPPmWyAksVcdoQ418Vz0hXK3ZXRygXj4s29qvY8GEpF1IuPcJIqExVhZ9DMRGPQ49WWwwaiUHXV0xJi97yVb79GDw= Received: by 10.78.205.7 with SMTP id c7mr845526hug.1166115804494; Thu, 14 Dec 2006 09:03:24 -0800 (PST) Received: by 10.78.168.20 with HTTP; Thu, 14 Dec 2006 09:03:24 -0800 (PST) Message-ID: <346a80220612140903meecf42av7383632e8173525@mail.gmail.com> Date: Thu, 14 Dec 2006 12:03:24 -0500 From: "Coleman Kane" To: obrien@freebsd.org In-Reply-To: <20061214155517.GA21748@dragon.NUXI.org> MIME-Version: 1.0 References: <200612140357.kBE3vY0Q053458@repoman.freebsd.org> <4580CD6A.5090802@samsco.org> <20061213201031.T26658@ns1.feral.com> <4580D3BB.7060504@samsco.org> <20061213210116.P26879@ns1.feral.com> <4580DE4E.3080008@samsco.org> <20061214155517.GA21748@dragon.NUXI.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: cvs-src@freebsd.org, Scott Long , src-committers@freebsd.org, mjacob@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/amd64/conf GENERIC X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: cokane@cokane.org List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Dec 2006 17:16:13 -0000 On 12/14/06, David O'Brien wrote: > > On Wed, Dec 13, 2006 at 08:13:24PM -0800, mjacob@freebsd.org wrote: > > Secondly, I would *like* to have SMP on as a default in RELENG_6 for > > amd64, as it would avoid doing what I've done twice already- fresh > > sysinstall may or may not have installed an SMP kernel but going off and > > building GENERIC then lost me my SMP. It's sort a violation of POLA. > > Rather close what happened to me and what lead to the commit. > > > On Wed, Dec 13, 2006 at 10:17:02PM -0700, Scott Long wrote: > > mjacob@freebsd.org wrote: > > > Scott Long wrote: > > > > There wasn't a full switchover to SMP at 6.0 because an SMP kernel > > > > on a UP system incurs a measurable runtime overhead, and we wanted > > > > to present a system that showed the best of FreeBSD to people who > > > > wanted to run it > > Then why is sparc64's GENERIC kernel SMP in RELENG_6? > > > > > But David's point is that most AMD64 boxes *are* SMP, not UP. Is > > > that wrong? > > > > 1. There are plenty of single core Opterons and Athlon64 chips still > > in service. > > A few points: > > * FreeBSD is predominately a server OS, not home desktop OS. > > * Practically all single core Opteron's are used in multi-socket systems. > There are very, very few Opteron single socket, single core Opteron's in > service as there are only a very small handful of single socket 940-pin > motherboards. > > * Most Athlon64 single-core CPU's are run in 32-bit "i386" mode. > FreeBSD/i386 isn't the platform I (and presumably Matt) are talking > about. > > > Maybe AMD sells more SMP systems now than UP systems, but their prior > > sales of UP systems didn't magically disappear overnight. > > This is not an AMD-only situation. > > Intel has been selling dual-core processors since 18 April 2005, and now > sells quad-core processors. Also, Intel kept Long Model (i.e., EM64T) > to the server/workstation segment until its dual-core processors. For > instance, most Intel laptops cannot run FreeBSD/AMD64. > > -- > -- David (obrien@FreeBSD.org) > _______________________________________________ > cvs-src@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/cvs-src > To unsubscribe, send any mail to "cvs-src-unsubscribe@freebsd.org" > Just to let you know, there are still a significant number of amd64 single-core laptops that are still sold these days.