From owner-freebsd-net  Wed Nov 20 11:59:33 2002
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 1E9E237B417; Wed, 20 Nov 2002 11:59:31 -0800 (PST)
Received: from HAL9000.homeunix.com (12-232-220-15.client.attbi.com [12.232.220.15])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 7B92D43E3B; Wed, 20 Nov 2002 11:59:30 -0800 (PST)
	(envelope-from dschultz@uclink.Berkeley.EDU)
Received: from HAL9000.homeunix.com (localhost [127.0.0.1])
	by HAL9000.homeunix.com (8.12.6/8.12.5) with ESMTP id gAKJxKm9001196;
	Wed, 20 Nov 2002 11:59:20 -0800 (PST)
	(envelope-from dschultz@uclink.Berkeley.EDU)
Received: (from das@localhost)
	by HAL9000.homeunix.com (8.12.6/8.12.5/Submit) id gAKJxJ3f001195;
	Wed, 20 Nov 2002 11:59:19 -0800 (PST)
	(envelope-from dschultz@uclink.Berkeley.EDU)
Date: Wed, 20 Nov 2002 11:59:19 -0800
From: David Schultz <dschultz@uclink.Berkeley.EDU>
To: Petri Helenius <pete@he.iki.fi>
Cc: freebsd-questions@FreeBSD.ORG, freebsd-net@FreeBSD.ORG
Subject: Re: panic: kmem_map too small
Message-ID: <20021120195919.GA679@HAL9000.homeunix.com>
Mail-Followup-To: Petri Helenius <pete@he.iki.fi>,
	freebsd-questions@FreeBSD.ORG, freebsd-net@FreeBSD.ORG
References: <0e3b01c28fc4$ff9a4ee0$862a40c1@PHE> <20021119152114.GA2228@HAL9000.homeunix.com> <3DDBDE2B.6050407@he.iki.fi>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <3DDBDE2B.6050407@he.iki.fi>
Sender: owner-freebsd-net@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-net.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-net>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-net>
X-Loop: FreeBSD.org

Thus spake Petri Helenius <pete@he.iki.fi>:
> >>I seem to get kmem_map too small panics when using large buffers with
> >>bpf. Is there a tunable I should be increasing?
> >>   
> >>
> >
> >Yes, increase KVA_PAGES in your kernel config.
> > 
> >
> I put in KVA_PAGES=1024
> with following results on next boot:
> 
> Fatal trap 12: page fault while in kernel mode

Read LINT (or NOTES) carefully.  You can't set KVA_PAGES to 1024,
because then your kernel would take up the entire 4 GB virtual
address space.  Since the kernel must fit into 4 GB alongside
every user process, that leaves you no room for programs.  Try a
more reasonable value like 512 (2 GB).

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-net" in the body of the message