Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759268AbZLPUrn (ORCPT ); Wed, 16 Dec 2009 15:47:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751539AbZLPUr2 (ORCPT ); Wed, 16 Dec 2009 15:47:28 -0500 Received: from courier.cs.helsinki.fi ([128.214.9.1]:41449 "EHLO mail.cs.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750926AbZLPUr1 (ORCPT ); Wed, 16 Dec 2009 15:47:27 -0500 From: Roger Oksanen To: Alan Stern Subject: Re: e100 REGRESSION in 2.6.32 Date: Wed, 16 Dec 2009 22:46:49 +0200 User-Agent: KMail/1.12.4 (Linux/2.6.32-ironman-1; KDE/4.3.4; i686; ; ) Cc: "Brandeburg, Jesse" , "Kirsher, Jeffrey T" , "Allan, Bruce W" , "Waskiewicz Jr, Peter P" , "Ronciak, John" , "e1000-devel@lists.sourceforge.net" , Kernel development list , netdev@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Message-Id: <200912162246.49611.roger.oksanen@cs.helsinki.fi> Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1181 Lines: 30 On Wednesday 16 December 2009 21:50:38 Alan Stern wrote: > On Wed, 16 Dec 2009, Brandeburg, Jesse wrote: > > Alan thanks for the report, I wonder if > > you can revert 98468efddb101f8a29af974101c17ba513b07be1 and see if that > > fixes it? > > It does indeed. Thanks for the quick response. > > > Roger on the To: line made that change, which may have broken e100 for > > your system. > > It looks simple enough, but obviously something is wrong with it. I'm looking into this. Quite a baffling problem though. I have no idea what causes the last 4 bytes to change slightly (6c 6b 6b a3). Perhaps the patch only changed the timings to uncloak a lurking bug.. struct sk_buff has users as it's last member, so perhaps there is a preempt point in dmapool that triggers a race with the rx path. I'll try to reproduce this.. -- Roger Oksanen http://www.cs.helsinki.fi/u/raoksane +358 50 355 1990 -- 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/