From owner-freebsd-questions Wed Aug 18 16:34:56 1999 Delivered-To: freebsd-questions@freebsd.org Received: from inet.chip-web.com (c1003518-a.plstn1.sfba.home.com [24.1.82.47]) by hub.freebsd.org (Postfix) with SMTP id 523FE15982 for ; Wed, 18 Aug 1999 16:34:44 -0700 (PDT) (envelope-from ludwigp@bigfoot.com) Received: (qmail 16939 invoked from network); 18 Aug 1999 23:34:51 -0000 Received: from speedy.chip-web.com (HELO speedy) (172.16.1.1) by inet.chip-web.com with SMTP; 18 Aug 1999 23:34:51 -0000 Message-Id: <4.2.0.58.19990818161356.00be2650@toy> X-Sender: ludwigp@toy (Unverified) X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.58 Date: Wed, 18 Aug 1999 16:24:38 -0700 To: "Paul T. Root" From: Ludwig Pummer Subject: Re: CPU Upgrade Cc: jason@townnews.com (Jason), freebsd-questions@FreeBSD.ORG In-Reply-To: <199908181735.MAA00584@iaces.com> References: <37BAE53F.616CD4F7@townnews.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 12:35 PM 8/18/1999 -0500, Paul T. Root wrote: >In a previous message, Jason said: > > We're running FreeBSD 2.2.5-Stable on a slower system, and we'd like to > > upgrade the processor in the machine. WIll we need to recompile the > > kernel if we perform this upgrade? If so, I'd appreciate the details on > > why (I'm a curious sort when it comes to things like this). I can't seem > > to find any solid information on the subject... > >You won't need to if you aren't changing processor types. I feel like extending his answer a bit. If you _are_ changing processor types (like from a 486/Cyrix MediaGX to a Pentium/K6/K6-2/Cyrix, or a Pentium/K6/K6-2 to a Pentium II/Pentium III/Xeon), then you need to make sure you have one of the lines: cpu "I586_CPU" cpu "I686_CPU" You could just recompile a kernel with both of those lines (and a line for a 486, if that's what you have now). It doesn't hurt to have the lines and not have the CPU (except maybe that the kernel eats up a bit more disk and RAM). But if you don't have the proper cpu line, then your kernel won't boot. --Ludwig Pummer To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message