From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966620AbXEGUad (ORCPT ); Mon, 7 May 2007 16:30:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S966613AbXEGUab (ORCPT ); Mon, 7 May 2007 16:30:31 -0400 Received: from gateway-1237.mvista.com ([63.81.120.158]:5712 "EHLO gateway-1237.mvista.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966592AbXEGUaa (ORCPT ); Mon, 7 May 2007 16:30:30 -0400 Subject: Re: Need help debugging RT-preempt patch From: Daniel Walker To: Tim Bird Cc: Thomas Gleixner , Ingo Molnar , dirk.behme@googlemail.com, linux kernel In-Reply-To: <463F7449.2020509@am.sony.com> References: <463F7449.2020509@am.sony.com> Content-Type: text/plain Date: Mon, 07 May 2007 13:28:39 -0700 Message-Id: <1178569719.3164.6.camel@imap.mvista.com> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-2.fc6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2007-05-07 at 11:47 -0700, Tim Bird wrote: > I've applied patch-2.6.21-rt1 to a 2.6.21 kernel I'm using. > With the patch applied, but no RT-Preempt options enabled, > I'm getting network failures (eth0 transmit timeouts) on > an OMAP board. Are you sure you don't have HardIRQS in Threads enabled? Also are you sure the kernel boots without the rt patch applied. > I'm not sure what the best method is to debug this. Should > I turn on the latency tracer? Should I post my configuration? > Should I try to break up the patch and apply changes in small doses? > I'm not familiar with the network code, or with the RT code (yet), > so for now I'm kind of stumbling in the dark. > > Note that I have other patches applied, for platform support > for the OMAP. > > I believe ARM (or OMAP) is not supported by the RT-preempt patch > at the moment. But I'd like to carry the patches in my kernel even > if the options for RT-preempt are off, because I want to experiment > with RT-preempt on other platforms (x86 and MIPS). ARM is supported, but specific boards are hit or miss.. I've had OMAP working _in the past_ with this patch applied, http://lkml.org/lkml/2006/12/10/59 There was also a patch released on one of the OMAP lists a while back from Dirk Behme to get OMAP working on a mor recent rt release.. Daniel