From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mattia Dongili Subject: Re: dynticks + iptables almost stops the boot process [was: Re: 2.6.20-rc6-mm3] Date: Tue, 6 Feb 2007 20:28:40 +0100 Message-ID: <20070206192840.GB2971@inferi.kami.home> References: <20070131215241.GB2890@inferi.kami.home> <20070131232130.GC4137@inferi.kami.home> <1170358572.29240.292.camel@localhost.localdomain> <1170360101.29240.297.camel@localhost.localdomain> <20070201211137.GA2830@inferi.kami.home> <1170369202.29240.339.camel@localhost.localdomain> <20070202191802.GA4262@inferi.kami.home> <1170448034.29240.364.camel@localhost.localdomain> <20070202204344.GB4262@inferi.kami.home> <20070206164826.GA3491@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Thomas Gleixner , Andrew Morton , linux-kernel@vger.kernel.org, mingo@redhat.com, netdev@vger.kernel.org, netfilter-devel@lists.netfilter.org To: Ingo Molnar Return-path: Received: from aa014msr.fastwebnet.it ([85.18.95.74]:39790 "EHLO aa014msr.fastwebnet.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965344AbXBFT3E (ORCPT ); Tue, 6 Feb 2007 14:29:04 -0500 Content-Disposition: inline In-Reply-To: <20070206164826.GA3491@elte.hu> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Tue, Feb 06, 2007 at 05:48:26PM +0100, Ingo Molnar wrote: > > Mattia, > > * Mattia Dongili wrote: > > > > I have it halfways reproducible now and I'm working to find the root > > > cause. Thanks for providing the info. > > > > Great, I'm obviously available to test any patch :) > > Could you try the patch below? The RCU serialization code (a rare call > but can be common in some types of setups) has a nasty implicit > dependency on the HZ tick - which until now was a hidden wart but became > an explicit bug under dynticks. Maybe this is what is slowing down your > box. No, not this. Anyway the last patch Thomas forwarded does fix the problem. By the way, I have all the patches I received stacked up, if you want me to test some different combination, just ask. Thanks -- mattia :wq!