From owner-freebsd-questions Fri Nov 2 22: 7:21 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mtiwmhc22.worldnet.att.net (mtiwmhc22.worldnet.att.net [204.127.131.47]) by hub.freebsd.org (Postfix) with ESMTP id 442A637B408 for ; Fri, 2 Nov 2001 22:07:18 -0800 (PST) Received: from columbia ([12.93.208.35]) by mtiwmhc22.worldnet.att.net (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20011103060716.WSRM4554.mtiwmhc22.worldnet.att.net@columbia>; Sat, 3 Nov 2001 06:07:16 +0000 From: "Andrew C. Hornback" To: "Mark Hughes" , Subject: RE: SMP kernel with 1 processor.... Date: Sat, 3 Nov 2001 01:06:19 -0500 Message-ID: <000801c1642d$a7ee4200$6600000a@columbia> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal In-Reply-To: <006101c1642b$57af4480$0200a8c0@mark2> X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > -----Original Message----- > From: Mark Hughes [mailto:mark@dvdnews.co.uk] > Sent: Saturday, November 03, 2001 12:49 AM > To: Andrew C. Hornback; freebsd-questions@FreeBSD.ORG > Subject: Re: SMP kernel with 1 processor.... > > > Also, how long is it going to take to install a second > processor and do a > > kernel recompile? You've gotta take the machine fully off-line and > powered > > down to add the second proc (unless you're running hardware that allows > hot > > swap of processors, which would be REALLY cool)... > > indeed it would... if only :-) I've seen machines like that... mega high $$$ from my point of view. > > And even then, you could compile the SMP kernel and leave it sitting on > the > > machine, run it on a single proc kernel, and switch it over once you've > got > > the second processor in. > > this is true, and sounds like a good idea. So, other than those two lines > in the kernel config, is there anything else that one needs to change in > order to enable the use of two processors? Shouldn't be, aside from some possible hardware configuration. I know that some older Compaqs generally have to have some settings tweaked to make FreeBSD's SMP implementation work properly, but it's not rocket science. --- Andy To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message