From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759977AbYEXSw5 (ORCPT ); Sat, 24 May 2008 14:52:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757120AbYEXSwr (ORCPT ); Sat, 24 May 2008 14:52:47 -0400 Received: from mailout04.t-online.de ([194.25.134.18]:58251 "EHLO mailout04.t-online.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756628AbYEXSwr convert rfc822-to-8bit (ORCPT ); Sat, 24 May 2008 14:52:47 -0400 To: Steven Rostedt Subject: Re: CONFIG_PREEMPT causes corruption of application's FPU stack Cc: linux-kernel@vger.kernel.org Content-Disposition: inline From: j.mell@t-online.de Reply-To: j.mell@t-online.de Date: Sat, 24 May 2008 20:52:30 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Message-Id: <200805242052.30303.j.mell@t-online.de> X-ID: GMOxQsZvQhYXZSBhkEBbzynDCwFe9wREhlfTevwGfig7iM1tmRQpSqmtU2BoS5YZRW X-TOI-MSGID: c4fa1a40-00e2-4d17-b86c-fee17ed224e8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sonday, 18. May 2008, you wrote: > > On Sat, May 17, 2008 at 06:31:08PM +0200, J?rgen Mell wrote: > > > I tracked this down to a single kernel configuration option. If > > > CONFIG_PREEMPT is set to 'y' the application will start crashing. If > > > CONFIG_PREEMPT is replaced by CONFIG_PREEMPT_VOLUNTARY, the > > > application will run without errors. > > If you see it in the kernel.org kernel, can you please do a git-bisect > > to see which commit caused the problem? > This is a bit of a problem. I do not know whether there was *ever* a > kernel version with CONFIG_PREEMPT and without this problem as I have > not tried any older kernel version yet. I will go back to SUSE 10.2 and > try the 2.6.18 kernel that comes with it. I found now that the problem was introduced somewhere between the kernel.org kernels 2.6.19.7 and 2.6.20. I will start bisecting now. Bye, Jürgen