From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932121AbVLTVX7 (ORCPT ); Tue, 20 Dec 2005 16:23:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932122AbVLTVX6 (ORCPT ); Tue, 20 Dec 2005 16:23:58 -0500 Received: from dsl027-180-168.sfo1.dsl.speakeasy.net ([216.27.180.168]:14763 "EHLO sunset.davemloft.net") by vger.kernel.org with ESMTP id S932121AbVLTVX6 (ORCPT ); Tue, 20 Dec 2005 16:23:58 -0500 Date: Tue, 20 Dec 2005 13:23:58 -0800 (PST) Message-Id: <20051220.132358.106631597.davem@davemloft.net> To: benh@kernel.crashing.org Cc: johannes@sipsolutions.net, linux-kernel@vger.kernel.org, davem@redhat.com, eric.lemoine@gmail.com Subject: Re: sungem hangs in atomic if netconsole enabled but no carrier From: "David S. Miller" In-Reply-To: <1135113521.10035.107.camel@gaston> References: <1135080538.3937.3.camel@localhost> <1135113521.10035.107.camel@gaston> X-Mailer: Mew version 4.2.53 on Emacs 21.4 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Benjamin Herrenschmidt Date: Wed, 21 Dec 2005 08:18:40 +1100 > > > Turns out that if I remove the netconsole=... option to my kernel, all > > works fine and the system no longer hangs. Obviously not plugging in a > > network cable is pretty useless when netconsole is turned on, but I > > think it should not hang the system completely. So far I haven't been > > able to figure out where it actually hangs and don't even know how to do > > so -- I'm open for suggestions on how to find out why/where it hangs or > > even fixes. > > Hrm... I've heard various reports about problems with netconsole... I've > never tried it myself so far though. One thing I remember to beware of > is if sungem does a printk while holding its lock... I bet that's it, doing a printk while already in the netconsole printk output path.