From mboxrd@z Thu Jan 1 00:00:00 1970 From: jamal Subject: Re: circular locking, mirred, 2.6.24.2 Date: Thu, 06 Mar 2008 15:44:48 -0500 Message-ID: <1204836288.4457.100.camel@localhost> References: <20080224222035.M62480@visp.net.lb> <20080225095646.GA4321@ff.dom.local> <20080225104652.M2446@visp.net.lb> <20080225113930.GA4733@ff.dom.local> <20080305103935.M76165@visp.net.lb> <20080306134015.GA4571@ff.dom.local> <20080306135625.M25627@visp.net.lb> <1204813634.4440.59.camel@localhost> <20080306143910.M91001@visp.net.lb> Reply-To: hadi@cyberus.ca Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Jarek Poplawski , netdev@vger.kernel.org To: Denys Fedoryshchenko Return-path: Received: from wx-out-0506.google.com ([66.249.82.230]:54117 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755769AbYCFUoz (ORCPT ); Thu, 6 Mar 2008 15:44:55 -0500 Received: by wx-out-0506.google.com with SMTP id h31so74805wxd.4 for ; Thu, 06 Mar 2008 12:44:52 -0800 (PST) In-Reply-To: <20080306143910.M91001@visp.net.lb> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 2008-06-03 at 17:50 +0200, Denys Fedoryshchenko wrote: > Well, i am able to reproduce in much more trivial script. Tested 2.6.25-rc4 > also. > > modprobe ifb > ifconfig ifb0 up > TC=/sbin/tc > $TC qdisc del dev eth0 ingress 1>/dev/null 2>/dev/null > $TC qdisc add dev eth0 ingress > ${TC} filter add dev eth0 parent ffff: protocol ip prio 10 u32 \ > match u32 0 0 flowid 1:1 \ > action mirred egress redirect dev ifb0 > I have tried this on my laptop - 2.6.24 and it doesnt happen. Indicates whatever issues that are occuring must be post 2.6.24 since you are running something newer. > > locks(ethx, ifbx, and loopback). Smells like lockdep is getting it wrong? > No idea, i have strange lockup's on my systems where i have ifb, and that > make me worry. And i feel it is directly related with my love to use ifb > devices and way how i am using them. I will like to help resolve it - if i can reproduce it i can fix it. I love the fact you love to use ifb. I am going to try later on 2.6.25-rc4 that you are running. > > This sounds like a different issue from above - when did this start > > to happen? Is it at the same time as above warnings showing up? > > Yes, it is different issue seems, it is rare to lockup system , and i will > dig more, to understand how it is happening. Are you running std kernels or do you have some other patches? cheers, jamal