From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: BUG? locking issue(networking?) with latest git Date: Thu, 4 Sep 2008 07:21:56 +0000 Message-ID: <20080904072155.GA4691@ff.dom.local> References: <200809031422.24883.denys@visp.net.lb> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org To: Denys Fedoryshchenko Return-path: Received: from fk-out-0910.google.com ([209.85.128.187]:17333 "EHLO fk-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751331AbYIDHWE (ORCPT ); Thu, 4 Sep 2008 03:22:04 -0400 Received: by fk-out-0910.google.com with SMTP id 18so2475682fkq.5 for ; Thu, 04 Sep 2008 00:22:02 -0700 (PDT) Content-Disposition: inline In-Reply-To: <200809031422.24883.denys@visp.net.lb> Sender: netdev-owner@vger.kernel.org List-ID: On 03-09-2008 13:22, Denys Fedoryshchenko wrote: > I am getting strange lockup, all operations (tc, ifconfig,pppd) after few days running pppoe-server. > > Programgs getting blocked very strange way, i am not able to kill them even. > Softlockup detection enabled, lock dependencies (except lock dependency engine debugging), > RT mutexes and deadlock detection enabled too. > > I notice this bug few weeks ago, even before latest patches, and seems it still remains. > Do you mean this didn't happen with some 2.6.27-rc's? (There was quite substantial change in ppp_generic with lock_kernel() in 2.6.27-rc1.) > > Here is result of SysRQ +T: > Alas it shows only some tasks waiting for locks. Maybe it's enough for someone with better ppp knowledge, but unless there is such a response I guess you should better try with PROVE_LOCKING turned on yet. Jarek P.