From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: [PATCH 2.6.35] bonding: prevent netpoll over bonded interfaces Date: Sat, 26 Jun 2010 00:31:50 +0200 Message-ID: <87y6e2d9rd.fsf@basil.nowhere.org> References: <20100625195044.GQ7497@gospo.rdu.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org, amwang@redhat.com, fubar@us.ibm.com To: Andy Gospodarek Return-path: Received: from one.firstfloor.org ([213.235.205.2]:33011 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751791Ab0FYWbw (ORCPT ); Fri, 25 Jun 2010 18:31:52 -0400 In-Reply-To: <20100625195044.GQ7497@gospo.rdu.redhat.com> (Andy Gospodarek's message of "Fri, 25 Jun 2010 15:50:44 -0400") Sender: netdev-owner@vger.kernel.org List-ID: Andy Gospodarek writes: > Support for netpoll over bonded interfaces was added here: > > commit f6dc31a85cd46a959bdd987adad14c3b645e03c1 > Author: WANG Cong > Date: Thu May 6 00:48:51 2010 -0700 > > bonding: make bonding support netpoll > > but it is bad enough that we should probably just disable netpoll over > bonding until some of the locking logic in the bonding driver is changed > or converted completely to RCU. Simple actions like changing the active > slave in active-backup mode will hang the box if a high enough printk > debugging level is enabled. Normally you just need to prevent the printks when called from poll context. That's not rocket science. -Andi -- ak@linux.intel.com -- Speaking for myself only.