From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [Bugme-new] [Bug 11249] New: TC HTB hanging problem Date: Mon, 4 Aug 2008 10:55:06 -0700 Message-ID: <20080804105506.8b401320.akpm@linux-foundation.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: bugme-daemon@bugzilla.kernel.org, lansoweb@hotmail.com To: netdev@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:51723 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752269AbYHDRzc (ORCPT ); Mon, 4 Aug 2008 13:55:32 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Mon, 4 Aug 2008 08:01:05 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=11249 > > Summary: TC HTB hanging problem > Product: Networking > Version: 2.5 > KernelVersion: 2.6.23 and 2.6.25 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: Other > AssignedTo: acme@ghostprotocols.net > ReportedBy: lansoweb@hotmail.com > > > Latest working kernel version: > Earliest failing kernel version: 2.6.23 > > Distribution: Mandriva 2007.1 and 2008.0 > > Hardware Environment: > It happens in many different servers > > Software Environment: > Problem Description: > I have close to 200 servers, most with mandriva 2006.0 using kernel 2.6.15, > some with mandriva 2008.0 using kernel 2.6.23 or 2.6.25. In some of them > (kernels 2.6.23 and 2.6.25 confirmed) the server hangs at random (some servers > hang more than once a day, some once a month). > The hardware is different from each other and i have about 5 servers with > exactly the same configuration (proc, mem, ethernet, so one) and one hangs > every day while the others are running fine, all with the same rules for > traffic shapping (tc using htb). > I think that it is something related to tc because last week i accessed a > server and when i type tc del to remove the shapping it hanged. My client > restarted the server and about 10 minutes later i did it again with the same > effect. No kernel panic, no oops, just hangs. > I've read some posts and bugs but i see something related to ethernet driver > (like sk98lin), but it is happening with several servers with different > hardwares. > I have some servers with kernel 2.6.15 and, as far as i know, it doesn't happen > with them, but some of they use a different set of tc rules (a few less rules > actually) or none at all. > I don't use the kernel shippied with mandriva distro, always got kernel from > kernel.org and compilled myself. > > Steps to reproduce: > Handly, since it is random, it takes minutes or weeks to happen, but always > with some change in tc (start or stop).