Re: kernel config optimized
On 2004-04-19 14:31, Kevin D. Kinsey, DaleCo, S.P. [EMAIL PROTECTED] wrote: Brian Henning wrote: The following is a copy of my kernel config file. I am trying to optimize it as much as possible. do i need any of these psudo devices? pseudo-device loop # Network loopback Most people would leave this in. I've no idea what might break without it, but I'll wager something might ... for example, what would you think of a box that couldn't find localhost with both hands? No lo, that's what you might well get ... Yes please, leave it in! There aren't many things that *do* depend on being able to connect to localhost:* ports for doing useful work. However, one should be very careful with this option. The loopback interface is considered so 'essential' to the Unix culture that a lot of things might implicitly depend on it being there and working all the time. Examples of this include programs like: * Sendmail's local mail submission daemon (which listens for connections to 127.0.0.1:25 by default). * Caching name servers. My workstation at home runs, for various reasons, a caching named service. This happens to listen on 127.0.0.1:53 for incoming connections. Other services might need to use the loopback interface too. It's not as if the code of lo0 takes up a huge amount of memory or space. Risking breakage now or in 'surprisingly unexpected moments' the future just to save a few KB isn't worth the trouble IMHO. pseudo-device ether# Ethernet support pseudo-device sl 1 # Kernel SLIP pseudo-device ppp 1# Kernel PPP pseudo-device tun # Packet tunnel. tun is necessary for userland PPP. If you take out tun, ppp, and ether as well as SLIP, what protocols do you figure on using? Are you planning on connecting to anything? (Note that I'm not saying there's no other way, but these are so common ) I usually remove only SLIP support from my kernels, since I prefer using PPP if available and it generally *is* available at the places I had to move my workstation (either PPP or some form of Ethernet connection). pseudo-device pty # Pseudo-ttys (telnet etc) A lot of things can break if you remove this. In fact, a lot of things *will* break since pseudo-ttys are essential for a number of tasks that are considered very common in every day Unix operation. For example, without ptys you can't: * Run xterm(1) or any other program that requires ptys, like script(1) or screen(1). * Connect to your machine over telnet, rsh, or ssh. It's not a good idea to remove pty support from your kernel. I may be wrong, but wouldn't removing this cause remote access (most of it, ftp, telnet, ssh, etc.) to fail? You're not mistaken. Most of your list is stuff that is generally standard and fairly essential ... if you've minimized down this far, I'd say you're getting close to small enough, wouldn't you? True :) Cheers, - Giorgos ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: kernel config optimized
Brian Henning wrote: The following is a copy of my kernel config file. I am trying to optimize it as much as possible. do i need any of these psudo devices? pseudo-device loop # Network loopback Most people would leave this in. I've no idea what might break without it, but I'll wager something might ... for example, what would you think of a box that couldn't find localhost with both hands? No lo, that's what you might well get pseudo-device ether# Ethernet support pseudo-device sl 1 # Kernel SLIP pseudo-device ppp 1# Kernel PPP pseudo-device tun # Packet tunnel. tun is necessary for userland PPP. If you take out tun, ppp, and ether as well as SLIP, what protocols do you figure on using? Are you planning on connecting to anything? (Note that I'm not saying there's no other way, but these are so common ) pseudo-device pty # Pseudo-ttys (telnet etc) I may be wrong, but wouldn't removing this cause remote access (most of it, ftp, telnet, ssh, etc.) to fail? pseudo-device md # Memory disks pseudo-device gif # IPv6 and IPv4 tunneling pseudo-device faith 1 # IPv6-to-IPv4 relaying (translation) pseudo-device splash do i need any of these devices? device atadisk # ATA disk drives I suppose not if your disks are SCSI. device atapicd # ATAPI CDROM drives If no CDROM, or you have a SCSI CDROM, I guess not. options ATA_STATIC_ID # Static device numbering Thanks, Brian Most of your list is stuff that is generally standard and fairly essential ... if you've minimized down this far, I'd say you're getting close to small enough, wouldn't you? Kevin Kinsey ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: kernel config optimized
On Monday 19 April 2004 21:02, Brian Henning wrote: The following is a copy of my kernel config file. I am trying to optimize it as much as possible. do i need any of these psudo devices? pseudo-device loop # Network loopback pseudo-device ether# Ethernet support pseudo-device sl 1 # Kernel SLIP pseudo-device ppp 1# Kernel PPP pseudo-device tun # Packet tunnel. pseudo-device pty # Pseudo-ttys (telnet etc) pseudo-device md # Memory disks pseudo-device gif # IPv6 and IPv4 tunneling pseudo-device faith 1 # IPv6-to-IPv4 relaying (translation) pseudo-device splash You can safely remove SL, PPP, GIF and Faith, but I would keep the rest if I were you. do i need any of these devices? device atadisk # ATA disk drives device atapicd # ATAPI CDROM drives options ATA_STATIC_ID # Static device numbering Depends on the hardware. If you're not using any IDE drives then you can disable that. Cheers, Jorn [snip] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: kernel config optimized
On Mon, Apr 19, 2004 at 02:02:38PM -0500, Brian Henning wrote: The following is a copy of my kernel config file. I am trying to optimize it as much as possible. do i need any of these psudo devices? pseudo-device loop # Network loopback pseudo-device ether# Ethernet support pseudo-device sl 1 # Kernel SLIP pseudo-device ppp 1# Kernel PPP pseudo-device tun # Packet tunnel. pseudo-device pty # Pseudo-ttys (telnet etc) pseudo-device md # Memory disks pseudo-device gif # IPv6 and IPv4 tunneling pseudo-device faith 1 # IPv6-to-IPv4 relaying (translation) pseudo-device splash Do you use any of those devices? do i need any of these devices? device atadisk # ATA disk drives device atapicd # ATAPI CDROM drives options ATA_STATIC_ID # Static device numbering Do you use any of those devices? Kris pgp0.pgp Description: PGP signature
