From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755318Ab1G1IvY (ORCPT ); Thu, 28 Jul 2011 04:51:24 -0400 Received: from lvk-gate.cmc.msu.ru ([212.192.248.233]:34322 "EHLO mail.lvk.cs.msu.su" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750734Ab1G1IvT (ORCPT ); Thu, 28 Jul 2011 04:51:19 -0400 X-Spam-ASN: From: "Nikita V. Youshchenko" To: Peter Zijlstra Subject: Re: [ANNOUNCE] 3.0-rt4 Date: Thu, 28 Jul 2011 12:51:13 +0400 User-Agent: KMail/1.9.9 Cc: Thomas Gleixner , LKML , linux-rt-users , "Paul E. McKenney" , Steven Rostedt , Jason Wessel , lasaine@lvk.cs.msu.su References: <201107281224.44323@zigzag.lvk.cs.msu.su> <1311842677.5890.209.camel@twins> In-Reply-To: <1311842677.5890.209.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201107281251.16892@zigzag.lvk.cs.msu.su> X-AV-Checked: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Thu, 2011-07-28 at 12:24 +0400, Nikita V. Youshchenko wrote: > > (*) we need >1G of memory for data buffers, and have too much legacy > > software components so moving to 64bit system is not practical within > > available resource > > You can run a complete 32bit userspace on a 64bit kernel without any > problems. ... expect shared data between kernel and userspace (structures passed over ioctl()s, structures in mmapped buffers). Unfortunately, in scope of our project (that lasts since 2001 or so), we do have such issues :(.