Date: Tue, 3 Jul 2001 11:31:07 -0500 From: "Matthew D. Fuller" <fullermd@futuresouth.com> To: Mike Smith <mlsmith@mitre.org> Cc: hackers@FreeBSD.ORG Subject: Re: Config devices not in machine Message-ID: <20010703113107.E25927@futuresouth.com> In-Reply-To: <3B41F252.32882BE7@mitre.org>; from mlsmith@mitre.org on Tue, Jul 03, 2001 at 12:26:58PM -0400 References: <3B41F252.32882BE7@mitre.org>
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On Tue, Jul 03, 2001 at 12:26:58PM -0400, a little birdie told me that Mike Smith remarked > I'm new to FreeBSD (come from the *gasp* System V and RTU world) so I > hope this is the correct list for this. ( I'm sure I will be told if > it's not :-} ) > > Is there ANY penalty for having a device in your config file that is not > in your system?? It eats some RAM. It will waste a bit of time on the bootup probes (we're talking seconds, if that much) It takes a bit longer to compile (of course, far less than compiling 40 seperate kernels!) It's possible with some ISA devices that you can have conflicts, but you can generally work around those by disabling them in the kernel.conf either manually or from the boot -c editor (the changes were stored in the kernel binary in older versions, but anything reasonably recent will use the /boot/kernel.conf file). I am by no means the final authority on this, of course; but in my experience, you're going to see fractions of a percent increase in resource usage (primarily RAM) and some possible slight administrative overhead with conflict resolution. Far better solution, I'd say, than trying to customize everything. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Unix Systems Administrator | fullermd@futuresouth.com Specializing in FreeBSD | http://www.over-yonder.net/ "The only reason I'm burning my candle at both ends, is because I haven't figured out how to light the middle yet" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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