From owner-freebsd-smp Tue Jul 27 9:40:44 1999 Delivered-To: freebsd-smp@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [209.157.86.2]) by hub.freebsd.org (Postfix) with ESMTP id CA190152AA for ; Tue, 27 Jul 1999 09:40:40 -0700 (PDT) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.9.3/8.9.1) id JAA54559; Tue, 27 Jul 1999 09:39:43 -0700 (PDT) (envelope-from dillon) Date: Tue, 27 Jul 1999 09:39:43 -0700 (PDT) From: Matthew Dillon Message-Id: <199907271639.JAA54559@apollo.backplane.com> To: Peter Wemm Cc: Nate Williams , Tom Embt , freebsd-smp@FreeBSD.ORG Subject: Re: SMP kernel on dual board with single proc? References: <19990727105633.C228D1C9E@overcee.netplex.com.au> Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org : :Yes, but that's not what he asked. He wanted to know if a SMP kernel worked :on a SMP motherboard with one CPU, not if a UP kernel works on a 1 cpu SMP :motherboard. : :I have never tried it, I don't know. (and can't easily get to a machine to :find out since they are at the bottom of a stack) : :> Nate : :Cheers, :-Peter Since you have to modify NCPU anyway, I don't see there being much of a difference between compiling up an SMP kernel with NCPU=1, and compiling up a UP kernel. I think the question was (and the author can correct me if I'm wrong), simply whether it was possible to run FreeBSD on a duel-cpu motherboard which only had one cpu populated. The answer is yes. There is a 'plug' you need to stick into the unused cpu slot, which should have come with the motherboard, but that's the only issue I know of. -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message