From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753228AbZFAAQl (ORCPT ); Sun, 31 May 2009 20:16:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752187AbZFAAQe (ORCPT ); Sun, 31 May 2009 20:16:34 -0400 Received: from 41-052.adsl.zetnet.co.uk ([194.247.41.52]:56038 "EHLO mail.esperi.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751823AbZFAAQd (ORCPT ); Sun, 31 May 2009 20:16:33 -0400 To: Andrew Morton Cc: linux-kernel@vger.kernel.org, e1000-devel@lists.sourceforge.net, netdev@vger.kernel.org Subject: Re: 2.6.30rc7: ksoftirqd CPU saturation (x86-64 only, not x86-32) (e1000e-related?) References: <87prdozxns.fsf@hades.wkstn.nix> <20090531170350.1355b3f1.akpm@linux-foundation.org> From: Nix Emacs: The Awakening Date: Mon, 01 Jun 2009 01:16:26 +0100 In-Reply-To: <20090531170350.1355b3f1.akpm@linux-foundation.org> (Andrew Morton's message of "Sun, 31 May 2009 17:03:50 -0700") Message-ID: <87ljoczu3p.fsf@hades.wkstn.nix> User-Agent: Gnus/5.1008 (Gnus v5.10.8) XEmacs/21.5-b28 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-DCC-CTc-dcc2-Metrics: hades 1031; Body=4 Fuz1=4 Fuz2=4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1 Jun 2009, Andrew Morton said: > Let's cc netdev on this. > > Presumably it is a post-2.6.29 regression. I don't know: the earliest kernel this machine has ever run was 2.6.30rc5, and this failing 2.6.30rc7 kernel is the first 64-bit kernel I've ever run on it. So currently I have one single data point. I plan to try out 2.6.29 (and back to 2.6.25 or thereabouts) tomorrow and see if it ever worked: if it did I'll bisect for it (rendered tricky by the out-of-tree e1000e driver, but doable: it would be easier if I had a clue where the e1000-devel git tree is, if anywhere, but I still have no idea despite considerable searching). It seems to go wrong instantly, so replication is trivial, and this system can compile a kernel in slightly under a minute, so it shouldn't take too long to complete the bisection.