From owner-freebsd-drivers@FreeBSD.ORG Thu Jun 24 14:03:13 2010 Return-Path: Delivered-To: freebsd-drivers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0BD711065672 for ; Thu, 24 Jun 2010 14:03:13 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id D322A8FC15 for ; Thu, 24 Jun 2010 14:03:12 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id 7042D46BC5; Thu, 24 Jun 2010 10:03:12 -0400 (EDT) Received: from jhbbsd.localnet (smtp.hudson-trading.com [209.249.190.9]) by bigwig.baldwin.cx (Postfix) with ESMTPSA id 8E2608A03C; Thu, 24 Jun 2010 10:03:11 -0400 (EDT) From: John Baldwin To: freebsd-drivers@freebsd.org Date: Thu, 24 Jun 2010 10:02:39 -0400 User-Agent: KMail/1.12.1 (FreeBSD/7.3-CBSD-20100217; KDE/4.3.1; amd64; ; ) References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <201006241002.39092.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Thu, 24 Jun 2010 10:03:11 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=4.2 tests=AWL,BAYES_00 autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: KGB <380008156@qq.com> Subject: Re: Kernel panic of "spin lock held too long" X-BeenThere: freebsd-drivers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Writing device drivers for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Jun 2010 14:03:13 -0000 On Thursday 24 June 2010 7:30:00 am KGB wrote: > Hi All: > I am writing a driver module (named tej21.ko) under freebsd8-release(i386) and I had a problem of the kernel panic "spin lock held too long". > > When I kldload my driver module without smp support (kern.smp.disabled = 1),every thing is OK. > But when I support the smp ,I met the problem 'Kernel panic of "spin lock held too long" '. > > My Hardware : > 1.CPU: Pentium(R) Dual-Core CPU E5200 @ 2.50GHz (2499.95-MHz 686-class CPU) > > Software: > freeBSD 8 release i386. > > The dump message is below.Why is there this problem,can someone give me advice? > > /*------------------------------dump message ----------------------------------------------*/ > Unread portion of the kernel message buffer: > spin lock 0xc0d9e580 (sched lock 1) held by 0xc5546b40 (tid 100003) too long Can you get a trace of this thread (100003)? -- John Baldwin