From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [Bugme-new] [Bug 14147] New: System unresponsive if I unplug network cable while ethtool -p is running Date: Fri, 11 Sep 2009 12:55:46 -0700 Message-ID: <20090911125546.52185035.akpm@linux-foundation.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org, david.graham@intel.com To: netdev@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:45885 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756105AbZIKTzp (ORCPT ); Fri, 11 Sep 2009 15:55:45 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Wed, 9 Sep 2009 00:06:10 GMT bugzilla-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=14147 > > Summary: System unresponsive if I unplug network cable while > ethtool -p is running > Product: Networking > Version: 2.5 > Kernel Version: 2.6.30 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > AssignedTo: acme@ghostprotocols.net > ReportedBy: david.graham@intel.com > Regression: No > > > When a user runs the "ethtool -p ethX" to identify the physical interface by > flashing the appropriate interface LED, and then removes the cable at that > interface, the keyboard locks up. This is naturally annoying to customers with > multi-port systems, who wish to use ethtool -p so that they can > disconnect/connect interface cables to appropriate ports. > > I am told that this is because "the RTNL lock is held by ethtool, and the link > [down] message needs the RTNL", which would, I think, make this a kernel issue. > > This has been known about within INTEL for over 3 years, but only recently come > to my attention. I have verified it on a 2.6.30 system using a default kernel > configuration and the e1000e driver. > hah. cute.