From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261321AbVGQQ3t (ORCPT ); Sun, 17 Jul 2005 12:29:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261328AbVGQQ3t (ORCPT ); Sun, 17 Jul 2005 12:29:49 -0400 Received: from fest.stud.feec.vutbr.cz ([147.229.72.16]:27372 "EHLO fest.stud.feec.vutbr.cz") by vger.kernel.org with ESMTP id S261321AbVGQQ3s (ORCPT ); Sun, 17 Jul 2005 12:29:48 -0400 Message-ID: <42DA8779.3020005@stud.feec.vutbr.cz> Date: Sun, 17 Jul 2005 18:29:45 +0200 From: Michal Schmidt User-Agent: Mozilla Thunderbird 1.0 (X11/20041207) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Alistair John Strachan CC: Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: rt-preempt and x86_64? References: <200507171346.11377.s0348365@sms.ed.ac.uk> In-Reply-To: <200507171346.11377.s0348365@sms.ed.ac.uk> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alistair John Strachan wrote: > Hi Ingo, > > (I searched the list for rt realtime x86_64 x86-64 before posting this, so I > hope it's not a duplicate). > > I've noticed -31 compiles without notable error or warning on x86-64, so I > thought maybe it was a valid time to file a bug report about it not working. > > The machine currently runs 2.6.12 but when booting with PREEMPT_RT mode on the > same machine I get: > > init[1]: segfault at ffffffff8010e9c4 rip ffffffff8010e9c4 rsp > 00007fffffe28018 > [...] Do you have latency tracing enabled in the kernel config? Try disabling it. It's a known problem that it doesn't work on x86_64. Michal