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Date:      Tue, 14 Nov 2006 15:35:52 +0100 (CET)
From:      Oliver Fromme <olli@lurza.secnetix.de>
To:        freebsd-hackers@FreeBSD.ORG, gurdiga@gmail.com
Subject:   Re: bpf kernel module
Message-ID:  <200611141435.kAEEZqFr036308@lurza.secnetix.de>
In-Reply-To: <da7069940611132322u1fc10b37i89f16533e836831c@mail.gmail.com>

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Vlad GURDIGA wrote:
 > I'm trying to keep very close touch with 6.1_STABLE cvsupping sources
 > once a week or even more often.

You mean RELENG_6_1?  I don't think that makes sense,
because not many changes happen to that branch.  You
should only cvsup if necessary, i.e. when a security
fix (or otherwise critical fix) has been committed to
that branch.

 > I'm thinking of removing as much as
 > possible devices from the kernel loading them from /boot/loader.conf
 > instead,

Personally I don't think it's worth the effort.  I keep
most stuff static inside a big kernel.

 > so I could rebuild and install them without a whole
 > kernel/world rebuild and reboot when sources change. I'm not sure this
 > is a correct way, any piece of advice regarding this would be highly
 > appreciated. :)

When you update your sources, the recommended and official
way is to rebuild everything (kernel, modules, world) and
reboot.  Omitting any of these steps _might_ work under
certain circumstances, but it can also break in various
ways (either horribly or subtly, whichever creates the
most damage, according to Murphy's law).

 > So, I've successfully done that with sound and network card drivers,
 > but did not succeed with removing bpf from the kernel. Booting a
 > kernel with no bpf support, and with
 > ng_bpf_load="YES" in my loader.conf [which, I found on the questions
 > list that is not what I need], the pflogd fails to start with this
 > error:

There's currently no kernel module for the bpf(4) device,
so you have to put it statically in your kernel if you need
it.  ng_bpf is a netgraph node driver, it doesn't implement
/dev/bpf* devices, so it's not what you're looking for.

Best regards
   Oliver

-- 
Oliver Fromme,  secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd
Any opinions expressed in this message may be personal to the author
and may not necessarily reflect the opinions of secnetix in any way.

"A language that doesn't have everything is actually easier
to program in than some that do."
        -- Dennis M. Ritchie



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