FreeBSD Kernel Recompile, Does not exclude modules

[Steven Adams]

Hi, 

Ive already disabled usbd_enable=no in /etc/rc.conf

But still I get theses

root   399  0.0  0.0     0   12  ??  DL   Sat04PM   0:00.03  (usb0)
root   400  0.0  0.0     0   12  ??  DL   Sat04PM   0:00.00  (usbtask)

And yes I ran make install, I know it worked because I also compiled in
quota support which is now working and wasn't previously.

I am a 5year slackware linux user just moved over to FreeBSD so im used to
the linux kernel, that's why its confused me a little. FreeBSD is looking
great tho.. :)

But yeh wondering how I get rid of them 2 processes.

Thanks
Steve

-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org] On Behalf Of Arjan Van Leeuwen
Sent: Sunday, 11 July 2004 9:14 PM
To: Steven Adams
Cc: freebsd-questions at freebsd.org
Subject: Re: FreeBSD Kernel Recompile, Does not exclude modules

Hi Steve,

On Sun, 11 Jul 2004 17:25:40 +1000, Steven Adams <steve at drifthost.com>
wrote:
> Hey,
> 
> Reading from the FreeBSD Handbook I have compiled a new kernel that works
> fine.
> 
> In my config file I commented out a few things I don't need eg USB etc.
> 
> But for some reason when it booted back up into the new kernel, from ps
aux
> it shows usb is up and running..

You mean that the program usbd is running. This is a userland program
that detects new USB devices and starts some predefined sequence of
commands when a certain device enters the system. You can turn it off
by adding usbd_enable="NO" to /etc/rc.conf.

> 
> /boot/kernel shows that usb.ko is there.
> 
> I don't understand why its included which I commented it out

There's a difference between 'compiling something into the kernel' and
using a kernel module. usb.ko is a kernel loadable module - a module
that you can load with kldload if you need it. It's not compiled into
the kernel. When you had 'device usb' in your kernel, usb would be
compiled into the kernel and you'd never need to load the kernel
loadable module for it. Now, you've removed usb from your kernel
configuration file, so usb support is not in your kernel. Should you
need it later, you can always load the module.

If the module is not loaded, it doesn't take up any resources (except
for the hard drive space it uses), so it shouldn't bother you.

If you really don't want to compile any modules at all when building
your kernel (for example, to save time when building a kernel), add
NO_MODULES=true to /etc/make.conf.

Arjan
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