From owner-freebsd-hackers Tue Nov 5 21:23:13 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 92C2837B404 for ; Tue, 5 Nov 2002 21:23:12 -0800 (PST) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id B599343E3B for ; Tue, 5 Nov 2002 21:23:11 -0800 (PST) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.3/8.12.3) with ESMTP id gA65N1pk096501; Tue, 5 Nov 2002 22:23:01 -0700 (MST) (envelope-from imp@bsdimp.com) Date: Tue, 05 Nov 2002 22:22:52 -0700 (MST) Message-Id: <20021105.222252.79869244.imp@bsdimp.com> To: dnelson@allantgroup.com Cc: chuck_tuffli@agilent.com, freebsd-hackers@FreeBSD.ORG Subject: Re: load time module parameters? From: "M. Warner Losh" In-Reply-To: <20021106000300.GB1208@dan.emsphone.com> References: <20021105222958.GH17013@cre85086tuf.rose.agilent.com> <20021106000300.GB1208@dan.emsphone.com> X-Mailer: Mew version 2.1 on Emacs 21.2 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message: <20021106000300.GB1208@dan.emsphone.com> Dan Nelson writes: : In the last episode (Nov 05), Chuck Tuffli said: : > I'm a newbie to FreeBSD and am wondering if there is a way to pass : > loadable kernel modules parameters. Under Linux, if a module had : > configurable parameters "a" and "b", you can do something like : > : > insmod module.o parameters="a:10 b:5" : > : > I noticed that some of the drivers grabed information from the : > "environment" using getenv_int(), but I couldn't seem to get this to : > work. Thanks for any thoughts. : : You can use /usr/bin/kenv to set kernel env variables, or you can have : your module register a dynamic sysctl variable that the user can tweak : after the module has been loaded. I've used the sysctl method myself : and it works fine. Hmmm, if you can use kenv to set variables, then you can use the TUNABLE_FOO interface. I didn't know that setting had been added... Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message