From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763180AbXHIXQ2 (ORCPT ); Thu, 9 Aug 2007 19:16:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755982AbXHIXQU (ORCPT ); Thu, 9 Aug 2007 19:16:20 -0400 Received: from one.firstfloor.org ([213.235.205.2]:40823 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755089AbXHIXQT (ORCPT ); Thu, 9 Aug 2007 19:16:19 -0400 Date: Fri, 10 Aug 2007 01:16:18 +0200 From: Andi Kleen To: Chuck Ebbert Cc: Andi Kleen , linux-kernel , Jeremy Fitzhardinge Subject: Re: i386 doublefault handler is broken with CONFIG_DEBUG_SPINLOCK Message-ID: <20070809231618.GC1845@one.firstfloor.org> References: <46BB4599.2020900@redhat.com> <46BB5F9B.6050808@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46BB5F9B.6050808@redhat.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 09, 2007 at 02:40:27PM -0400, Chuck Ebbert wrote: > On 08/09/2007 01:49 PM, Andi Kleen wrote: > > Chuck Ebbert writes: > >> Initializing FS in the doublefault_tss should fix it. > >> > >> Signed-off-by: Chuck Ebbert > >> > >> --- > >> > >> NOTE: not even compile tested. > > > > Can you please test it? > > > > It compiles but I can't really test it further right now. I tested it. Even on a box without spin lock debugging I get a hard hang after double fault, gdt at c1404000 [255 bytes] even though it should have printed the registers. So it looks like there is more broken in the DF handler than just this. -Andi