From owner-freebsd-hackers@FreeBSD.ORG  Thu Oct  7 06:35:40 2004
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
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 A9BA016A4CE
	for <hackers@freebsd.org>; Thu,  7 Oct 2004 06:35:40 +0000 (GMT)
Received: from spider.deepcore.dk
	(cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166])
	by mx1.FreeBSD.org (Postfix) with ESMTP id DE9FA43D54
	for <hackers@freebsd.org>; Thu,  7 Oct 2004 06:35:39 +0000 (GMT)
	(envelope-from sos@DeepCore.dk)
Received: from [194.192.25.143] (laptop.deepcore.dk [194.192.25.143])
	by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id i976ZTAT079560;
	Thu, 7 Oct 2004 08:35:31 +0200 (CEST)
	(envelope-from sos@DeepCore.dk)
Message-ID: <4164E3A9.2050209@DeepCore.dk>
Date: Thu, 07 Oct 2004 08:35:21 +0200
From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
User-Agent: Mozilla Thunderbird 0.7.2 (X11/20040802)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Roman Kurakin <rik@cronyx.ru>
References: <41645625.3020209@cronyx.ru>
In-Reply-To: <41645625.3020209@cronyx.ru>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
X-mail-scanned: by DeepCore Virus & Spam killer v1.4
cc: hackers@freebsd.org
Subject: Re: Printing from kernel
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 07 Oct 2004 06:35:40 -0000

Roman Kurakin wrote:
> Hi,
>=20
>     I have some problems with printing from kernel.
> At first I think that my problems was cause I use printf,
> but changed all of them to log cause it safe to use from
> interrupt handlers. The situation become better but I still
> observe system lockup in case I output some debug information
> from my driver.

Yes its a known problem, if you output "enough" from the kernel the=20
console will eventually lockup, its been so for ages, and I dont think=20
anyone really have been looking into it.

--=20

-S=F8ren