From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Fw: [Bugme-new] [Bug 3747] New: HTB causes machine lockups Date: Mon, 15 Nov 2004 12:20:59 -0800 Message-ID: <20041115122059.4cfcd213.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: To: netdev@oss.sgi.com Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Begin forwarded message: Date: Mon, 15 Nov 2004 04:46:38 -0800 From: bugme-daemon@osdl.org To: bugme-new@lists.osdl.org Subject: [Bugme-new] [Bug 3747] New: HTB causes machine lockups http://bugme.osdl.org/show_bug.cgi?id=3747 Summary: HTB causes machine lockups Kernel Version: 2.4.26 Status: NEW Severity: high Owner: acme@conectiva.com.br Submitter: alchemyx@uznam.net.pl Distribution: PLD Linux 1.1 with 2.4.26 vanilla kernel Hardware Environment: 2x Xeon 2.4 GHz, 1 GB of ram, 2x e1000 NICs Software Environment: iproute2-2.4.7.ss020116 Problem Description: I have some network traffic shaping rules used on a Linux box. For example I have hundreds of them on eth1. I am using HTB in all cases (sometimes attaching SFQ to HTB rules). Everything works fine, until I issue: tc qdisc del dev eth1 root Which causes a machine lockup. Sometimes it happens day after day, but sometimes once a month. There are no traces in logs, no oopses, and so on. Machine just freezes (you see login on your screen, but can't type anything, can't ping that machine, ctrl-alt-del or sysrq doesn't work). Problem was on kernels from 2.4.21 up to 2.4.26. Haven't tried 2.4.27 and 2.6.x on that box yet. Steps to reproduce: Hard to tell really. You need to set up a script creating hunderds of HTB rules and regenerating them every (let say) 15 minutes, issuing 'tc qdisc del dev ethX' everytime. ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.