From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757946AbYEDTzm (ORCPT ); Sun, 4 May 2008 15:55:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754921AbYEDTzc (ORCPT ); Sun, 4 May 2008 15:55:32 -0400 Received: from fmailhost04.isp.att.net ([207.115.11.54]:45490 "EHLO fmailhost01.isp.att.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754119AbYEDTzb (ORCPT ); Sun, 4 May 2008 15:55:31 -0400 X-Originating-IP: [74.251.4.130] Date: Sun, 4 May 2008 14:55:29 -0500 From: Jay Cliburn To: Jarek Poplawski Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Chris Snook Subject: Re: Need help debugging memory corruption Message-ID: <20080504145529.2eac672e@osprey.hogchain.net> In-Reply-To: <481DCE4C.9070805@gmail.com> References: <20080503130951.091392ba@osprey.hogchain.net> <481DC731.5090303@gmail.com> <481DCE4C.9070805@gmail.com> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.5; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 04 May 2008 16:55:08 +0200 Jarek Poplawski wrote: > Jarek Poplawski wrote, On 05/04/2008 04:24 PM: > ... > > > I'm definitely with less experience, so I wonder why it can't be > > a simple race between atl1_clean_rx_ring() and something (maybe even > > pending atl1_intr_rx()) on the other cpu writing skb while kfreeing? > > > Hmm... atl1_intr_rx() looks impossible, so atl1_alloc_rx_buffers()? I booted with nosmp and the bug is *much* harder to hit, but I still hit it once out of about 10 tries. Does the fact that I hit it once using nosmp disprove the race theory?