From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2993329AbXDTUV2 (ORCPT ); Fri, 20 Apr 2007 16:21:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2993327AbXDTUV2 (ORCPT ); Fri, 20 Apr 2007 16:21:28 -0400 Received: from py-out-1112.google.com ([64.233.166.176]:61904 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2993331AbXDTUV0 (ORCPT ); Fri, 20 Apr 2007 16:21:26 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=EQNBUnw8xGoTs5wILrhAqtukcfneUG3R2CntNuvh/bwc0ffsYR9fdBubyouy8kmkziqAjkl+dvJhkJ1fPX4gpl8b6PDQddkzgkyL7z9nyPFtfuN8inTez+ZhGAYNOIvi71S4nwBLaE+CznrWt+Ejf7wNOn7a42yX9acHMxQ//lE= Message-ID: Date: Fri, 20 Apr 2007 22:21:26 +0200 From: "Mark Stier" To: linux-kernel@vger.kernel.org Subject: FYI: Xen or kernel bug? MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, tcp_vegas produces division by zero kernel oopses in dom0 when running a Xen-patched 2.6.16.28 kernel. I have tracked down the problem to line #256 in tcp_vegas.c: presumably due to flaky Xen timing, the rtt seems to get zero from time to time (adding 1 to the rtt variable solves the problem for me). The same should apply to line #140 in tcp_veno.c, too. Best regards, Mark