From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Morris Subject: FYI: Xen or kernel bug? (fwd) Date: Fri, 20 Apr 2007 16:39:27 -0400 (EDT) Message-ID: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII To: netdev@vger.kernel.org Return-path: Received: from mail1.sea5.speakeasy.net ([69.17.117.3]:51861 "EHLO mail1.sea5.speakeasy.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754494AbXDTUja (ORCPT ); Fri, 20 Apr 2007 16:39:30 -0400 Received: from dsl092-066-197.bos1.dsl.speakeasy.net (HELO d.namei) ([66.92.66.197]) (envelope-sender ) by mail1.sea5.speakeasy.net (qmail-ldap-1.03) with AES256-SHA encrypted SMTP for ; 20 Apr 2007 20:39:29 -0000 Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Could be an upstream kernel issue lurking. ---------- Forwarded message ---------- Date: Fri, 20 Apr 2007 22:21:26 +0200 From: Mark Stier To: linux-kernel@vger.kernel.org Subject: FYI: Xen or kernel bug? 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/