From owner-freebsd-questions Sat Aug 24 19:57:07 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id TAA25679 for questions-outgoing; Sat, 24 Aug 1996 19:57:07 -0700 (PDT) Received: from gdi.uoregon.edu (cisco-ts17-line3.uoregon.edu [128.223.150.220]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id TAA25674 for ; Sat, 24 Aug 1996 19:57:03 -0700 (PDT) Received: from localhost (dwhite@localhost) by gdi.uoregon.edu (8.7.5/8.6.12) with SMTP id TAA00312; Sat, 24 Aug 1996 19:57:07 -0700 (PDT) Date: Sat, 24 Aug 1996 19:57:07 -0700 (PDT) From: Doug White Reply-To: dwhite@resnet.uoregon.edu To: Francisco Reyes cc: FreeBSD questions Subject: Re: Kernel customation questions In-Reply-To: <199608250014.AAA23406@pop01.ny.us.ibm.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Sat, 24 Aug 1996, Francisco Reyes wrote: > I did my first new kernel today and it worked. What I don't > understand is why it is taking the same amount of memory as the > previous one. It depends on what you put in and take out. Most of the kernel is reserved for the various system tables, so your device optimizations may not have a sizable impact on the kernel size. > I am also confused about: > >machine "i386" > >cpu "I386_CPU" > >cpu "I486_CPU" > >cpu "I586_CPU" > > The explanation in LINT mentions that the machine specifies the cpu > one is compiling for. Can I change "i386" to "i486"? No. Leave machine alone. You can delete the CPU lines that don't describe your computer's CPU, though. If you have a 486, you can dump the I386_CPU and I586_CPU lines. That will enable some 486-specific optimizations that may speed things up a tiny bit. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major