From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sujit K M Subject: Re: beagleboard RT problem Date: Mon, 14 Jun 2010 16:39:56 +0530 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Maksym Parkachov , linux-rt-users@vger.kernel.org To: John Kacur Return-path: Received: from mail-vw0-f46.google.com ([209.85.212.46]:55989 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756044Ab0FNLJ5 (ORCPT ); Mon, 14 Jun 2010 07:09:57 -0400 Received: by vws14 with SMTP id 14so524136vws.19 for ; Mon, 14 Jun 2010 04:09:57 -0700 (PDT) In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Mon, Jun 14, 2010 at 4:35 PM, John Kacur wrote: > > > On Mon, 14 Jun 2010, Sujit K M wrote: > >> > CONFIG_PREEMPT_RCU=y >> > # CONFIG_PREEMPT_RCU_TRACE is not set >> >> Why is RCU being set to y? > > It should be fine to set it to y Does Angstrom stable distribution need RCU? > >> >> > # CONFIG_PREEMPT_NONE is not set >> > # CONFIG_PREEMPT_VOLUNTARY is not set >> > # CONFIG_PREEMPT_DESKTOP is not set >> >> Fine. >> >> > CONFIG_PREEMPT_RT=y >> >> This is correct. >> >> > CONFIG_PREEMPT=y >> > CONFIG_PREEMPT_SOFTIRQS=y >> > CONFIG_PREEMPT_HARDIRQS=y >> >> I think this part is susceptible. > > Suceptible to what? > Those setting are all correct. > In fact, most are automatically set for you after > choosing CONFIG_PREEMPT_RT=y I thought in any Real Time system there can be only SoftIRQ's or HardIRQ's. Also CONFIG_PREEMPT is an Non RT design. > > His problem is not with the config. > Above I think It is certainly an Config problem.