Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44193 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753373Ab2DEKeO (ORCPT ); Thu, 5 Apr 2012 06:34:14 -0400 Date: Thu, 5 Apr 2012 12:32:54 +0200 From: Stanislaw Gruszka To: Johannes Berg , maciej.rutecki@gmail.com Cc: Linux Kernel Mailing List , "Rafael J. Wysocki" , linux-wireless@vger.kernel.org, netdev Subject: Re: [3.4-rc1][Regression][network wireless] 'task xxxx blocked for more than 120 seconds' after resume Message-ID: <20120405103254.GE2378@redhat.com> (sfid-20120405_123434_230363_63041A25) References: <201204022157.05598.maciej.rutecki@gmail.com> <1333440469.3574.0.camel@jlt3.sipsolutions.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1333440469.3574.0.camel@jlt3.sipsolutions.net> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Apr 03, 2012 at 10:07:49AM +0200, Johannes Berg wrote: > -ilw > +netdev > > I have no idea what this could be, but I'm almost certain it's not > caused by our wireless driver. Looks more like rtl8169 is to blame. I'm not sure. Looks like there is deadlock or infinite loop in process that holds rtnl lock. This can be wireless driver, wired driver or generic network code bug. Maciej, please recompile with CONFIG_LOCKDEP and check if it will not find any deadlock. If not, when problem will happen please do echo w > /proc/sysrq-trigger dmesg -c > dmesg1.txt echo t > /proc/sysrq-trigger dmesg > dmesg2.txt and provide those files. Additionally there are also lot in dmesg: netlink: 140 bytes leftover after parsing attributes. This need to be investigated as well. Perhaps you could modify error message, to show what netlink messages/attributes are processed. Thanks Stanislaw