From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755211Ab1G1IGo (ORCPT ); Thu, 28 Jul 2011 04:06:44 -0400 Received: from www.linutronix.de ([62.245.132.108]:33150 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754880Ab1G1IGd (ORCPT ); Thu, 28 Jul 2011 04:06:33 -0400 Date: Thu, 28 Jul 2011 10:06:26 +0200 (CEST) From: Thomas Gleixner To: "Nikita V. Youshchenko" cc: LKML , linux-rt-users , Peter Zijlstra , "Paul E. McKenney" , Steven Rostedt , Jason Wessel , lasaine@lvk.cs.msu.su Subject: Re: [ANNOUNCE] 3.0-rt4 In-Reply-To: <201107281133.09107@zigzag.lvk.cs.msu.su> Message-ID: References: <201107281133.09107@zigzag.lvk.cs.msu.su> User-Agent: Alpine 2.02 (LFD 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 28 Jul 2011, Nikita V. Youshchenko wrote: > > The list of disabled config option is now: > > > > - CONFIG_HIGHMEM [ see the mess it created in 33-rt ] > > Could someone please point me to information on this? > > In our setup, we do use PREEMPT_RT + HIGHMEM, on .33 for now (but want to > upgrade because of new hardware support issues with .33). Up to now, we > did not face any issues related to PREEMPT_RT + HIGHMEM combination. Yes, it works in 33-rt, but the way it's implemented is a horrible hack. I had not enough capacity to implement that cleanly for 3.0-rt, so I simply dropped it for now. The preliminary patches are there (mainly distangling the disable_pagefault logic), so it should not be that hard. Thanks, tglx