Date: Tue, 05 Nov 2002 22:22:52 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: dnelson@allantgroup.com Cc: chuck_tuffli@agilent.com, freebsd-hackers@FreeBSD.ORG Subject: Re: load time module parameters? Message-ID: <20021105.222252.79869244.imp@bsdimp.com> In-Reply-To: <20021106000300.GB1208@dan.emsphone.com> References: <20021105222958.GH17013@cre85086tuf.rose.agilent.com> <20021106000300.GB1208@dan.emsphone.com>
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In message: <20021106000300.GB1208@dan.emsphone.com>
Dan Nelson <dnelson@allantgroup.com> 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
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