Date: Fri, 20 Apr 2001 13:20:04 -0400 From: Joel Dinel <jdinel@touchtunes.com> To: freebsd-questions@freebsd.org Subject: Optimizing a custom kernel Message-ID: <3AE06FC4.D91BE05D@touchtunes.com>
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I've been building custom kernels on 4.2-RELEASE for a little while now, but I'm pretty sure I left behind a lot of stuff I could've removed. I'd like to optimize my kernel as much as possible. Here's the setup of the machine I'm building the kernel on : CPU: Celeron (601.37-MHz 686-class CPU) RAM: 128 MB ad0: 14594MB <Maxtor 51536H2> [29651/16/63] at ata0-master UDMA66 acd0: CDROM <CREATIVE CD5233E> at ata1-master using WDMA2 pci1: <ATI Mach64-GZ graphics accelerator> at 0.0 xl0: <3Com 3c905B-TX Fast Etherlink XL> port 0xe800-0xe87f mem 0xd8000000-0xd800 pcm0: <AudioPCI ES1371> port 0xec00-0xec3f irq 5 at device 18.0 on pci0 fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0 psm0: <PS/2 Mouse> irq 12 on atkbdc0 I don't need USB, and I don't have any ISA cards. I don't plan on using anything connected to the serial port(s) or the parallel port. Here's my kernel config file. I didn't remove any of the serial or parallel port stuff yet. I did remove IPV6 entries, though. # # GENERIC -- Generic kernel configuration file for FreeBSD/i386 # # $FreeBSD: src/sys/i386/conf/DINJO,v 1.00 2001/04/19 16:37:07 dinjo Exp $ machine i386 cpu I686_CPU ident DINJO maxusers 32 options INET #InterNETworking options FFS #Berkeley Fast Filesystem options FFS_ROOT #FFS usable as root device [keep this!] options SOFTUPDATES #Enable FFS soft updates support options MFS #Memory Filesystem options MD_ROOT #MD is a potential root device options NFS #Network Filesystem options MSDOSFS #MSDOS Filesystem options CD9660 #ISO 9660 Filesystem options PROCFS #Process filesystem options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!] options UCONSOLE #Allow users to grab the console options USERCONFIG #boot -c editor options VISUAL_USERCONFIG #visual boot -c editor options KTRACE #ktrace(1) support options SYSVSHM #SYSV-style shared memory options SYSVMSG #SYSV-style message queues options SYSVSEM #SYSV-style semaphores options P1003_1B #Posix P1003_1B real-time extensions options _KPOSIX_PRIORITY_SCHEDULING options ICMP_BANDLIM #Rate limit bad replies options KBD_INSTALL_CDEV # install a CDEV entry in /dev device isa device eisa device pci # Floppy drives device fdc0 at isa? port IO_FD1 irq 6 drq 2 device fd0 at fdc0 drive 0 device fd1 at fdc0 drive 1 # ATA and ATAPI devices device ata0 at isa? port IO_WD1 irq 14 device ata1 at isa? port IO_WD2 irq 15 device ata device atadisk # ATA disk drives device atapicd # ATAPI CDROM drives options ATA_STATIC_ID #Static device numbering options ATA_ENABLE_ATAPI_DMA #Enable DMA on ATAPI devices # atkbdc0 controls both the keyboard and the PS/2 mouse device atkbdc0 at isa? port IO_KBD device atkbd0 at atkbdc? irq 1 flags 0x1 device psm0 at atkbdc? irq 12 device vga0 at isa? # splash screen/screen saver pseudo-device splash # syscons is the default console driver, resembling an SCO console device sc0 at isa? flags 0x100 # Floating point support - do not disable. device npx0 at nexus? port IO_NPX irq 13 # Serial (COM) ports device sio0 at isa? port IO_COM1 flags 0x10 irq 4 device sio1 at isa? port IO_COM2 irq 3 device sio2 at isa? disable port IO_COM3 irq 5 device sio3 at isa? disable port IO_COM4 irq 9 # Parallel port device ppc0 at isa? irq 7 device ppbus # Parallel port bus (required) device lpt # Printer device ppi # Parallel port interface device # PCI Ethernet NICs that use the common MII bus controller code. # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs! device miibus # MII bus support device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'') # Pseudo devices - the number indicates how many units to allocated. pseudo-device loop # Network loopback pseudo-device ether # Ethernet support pseudo-device tun # Packet tunnel. pseudo-device pty # Pseudo-ttys (telnet etc) pseudo-device md # Memory "disks" # The `bpf' pseudo-device enables the Berkeley Packet Filter. # Be aware of the administrative consequences of enabling this! pseudo-device bpf #Berkeley packet filter # PCM support device pcm What can I safely remove? -- Joel Dinel TouchTunes Digital Jukebox, Inc. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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