From owner-freebsd-stable@FreeBSD.ORG  Fri Mar 19 16:20:12 2010
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 081F2106566C;
	Fri, 19 Mar 2010 16:20:12 +0000 (UTC) (envelope-from imp@bsdimp.com)
Received: from harmony.bsdimp.com (bsdimp.com [199.45.160.85])
	by mx1.freebsd.org (Postfix) with ESMTP id B8AE28FC23;
	Fri, 19 Mar 2010 16:20:11 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1])
	by harmony.bsdimp.com (8.14.3/8.14.1) with ESMTP id o2JG9mWQ080072;
	Fri, 19 Mar 2010 10:09:48 -0600 (MDT) (envelope-from imp@bsdimp.com)
Date: Fri, 19 Mar 2010 10:10:07 -0600 (MDT)
Message-Id: <20100319.101007.177863014340882353.imp@bsdimp.com>
To: jhb@FreeBSD.org
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <201003190837.48346.jhb@freebsd.org>
References: <20100318192758.GP52442@uriah.heep.sax.de>
	<201003190837.48346.jhb@freebsd.org>
X-Mailer: Mew version 6.3 on Emacs 22.3 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: joerg_wunsch@uriah.heep.sax.de, freebsd-stable@FreeBSD.org
Subject: Re: Strange problem: if_xe only works in GENERIC kernel
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 19 Mar 2010 16:20:12 -0000

In message: <201003190837.48346.jhb@freebsd.org>
            John Baldwin <jhb@FreeBSD.org> writes:
: On Thursday 18 March 2010 3:27:58 pm Joerg Wunsch wrote:
: > I'm running into a strange problem with 8-current (or 8.0-RELEASE) on
: > an elderly Thinkpad 600E.
: > 
: > As long as I'm using the GENERIC kernel, an Intel Etherexpress PC card
: > works as expected:
: > 
: > interrupt storm detected on "irq11:"; throttling interrupt source
: > xe0: <Intel EtherExpress(TM) PRO/100 PC Card Mobile Adapter16> at port 
: 0x100-0x10f iomem 0x20000000-0x20000fff irq 11 function 0 config 1 on pccard1
: > xe0: version 0x45/0x04, 100Mbps capable
: > xe0: Ethernet address: 00:a0:c9:bc:b5:ef
: > xe0: [ITHREAD]
: > 
: > However, as soon as I start removing unneeded stuff from the kernel
: > config file, the driver completely jams.  It just sits there, the
: > machine blocks, until I eventually pop out the card, when I get the
: > following messages:
: > 
: > cbb1: ready never happened, status = 00
: > xe0: <Intel EtherExpress(TM) PRO/100 PC Card Mobile Adapter16> at port 
: 0x100-0x10f iomem 0x20000000-0x20000fff irq 11 function 0 config 1 on pccard1
: > xe0: version 0xff/0x07, 100Mbps capable
: > xe0: Ethernet address: 00:a0:c9:bc:b5:ef
: > xe0: [ITHREAD]
: > xe0: detached
: > cbb1: Bad Vcc requested
: > 
: > As the CPU is a little slow, recompiling kernels takes an eternity on
: > it (even with NO_KERNELCLEAN), so I could not isolate it to a single
: > line in the config file so far.
: 
: Sounds like the process of removing things prevented the interrupt storm from 
: being throttled somehow, and that ejecting the card caused the interrupt storm 
: to finally stop at which point the card was probed.  I would talk to Warner 
: (imp@) about trying to fix the interrupt storm.  Also, if you could narrow 
: down which particular item that you trim "breaks" it, that would be helpful.

Yes.  Do other cards cause this same problem?  The cbb1: Bad Vcc is a
big clue something is going wrong with the bridge, not the card.

Warner