From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263165AbVFXKND (ORCPT ); Fri, 24 Jun 2005 06:13:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263153AbVFXKND (ORCPT ); Fri, 24 Jun 2005 06:13:03 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:20369 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S263165AbVFXKMA (ORCPT ); Fri, 24 Jun 2005 06:12:00 -0400 Date: Fri, 24 Jun 2005 12:12:43 +0200 From: Jens Axboe To: Jeff Garzik Cc: linux-kernel@vger.kernel.org Subject: Re: SMP+irq handling broken in current git? Message-ID: <20050624101242.GK8193@suse.de> References: <20050623135318.GC9768@suse.de> <42BAEA67.7090606@pobox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42BAEA67.7090606@pobox.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 23 2005, Jeff Garzik wrote: > Jens Axboe wrote: > >Hi, > > > >Something strange is going on with current git as of this morning (head > >ee98689be1b054897ff17655008c3048fe88be94). On an old test box (dual p3 > >800MHz), using the same old config I always do on this box has very > >broken interrupt handling: > > Does 2.6.12 work for you? > 2.6.11? > > I noticed a few "2.6.12 is broken, 2.6.11 works" bug reports with > vaguely similar circumstances -- irq handling being a culprit. To follow up on this on the list, the culprit appears to be the attached string.h update introduced between -rc3 and -rc4. Backing it out makes the kernel work, making it clobber memory (as suggested by Linus) makes it work as well. The failed test was in mpparse.c, it didn't recognise the pci bus. -- Jens Axboe