Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932671AbWBTG7Q (ORCPT ); Mon, 20 Feb 2006 01:59:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932672AbWBTG7Q (ORCPT ); Mon, 20 Feb 2006 01:59:16 -0500 Received: from ms-smtp-03.nyroc.rr.com ([24.24.2.57]:21436 "EHLO ms-smtp-03.nyroc.rr.com") by vger.kernel.org with ESMTP id S932671AbWBTG7Q (ORCPT ); Mon, 20 Feb 2006 01:59:16 -0500 Date: Mon, 20 Feb 2006 01:58:36 -0500 (EST) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: Sasha Khapyorsky cc: s.schmidt@avm.de, Greg KH , torvalds@osdl.org, kkeil@suse.de, LKML , opensuse-factory@opensuse.org, libusb-devel@lists.sourceforge.net, Ingo Molnar , Thomas Gleixner Subject: Re: 2.6.16 serious consequences / GPL_EXPORT_SYMBOL / USB drivers of major vendor excluded In-Reply-To: <20060220031130.GA9929@khap> Message-ID: References: <20060205205313.GA9188@kroah.com> <20060219045716.GA9880@khap> <20060220031130.GA9929@khap> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1093 Lines: 26 On Mon, 20 Feb 2006, Sasha Khapyorsky wrote: > On 12:02 Sun 19 Feb , Steven Rostedt wrote: > > > > Disclaimer: This is in no way a push to get the -rt patch into mainline > > at the moment. The patch is still young and is not ready yet. > > Hmm, it was not about -rt patch - 40 millisecond response time is > realistic for userspace even without -rt patch. There is no guarantee, > but in practice this may work very well and keep low percents of failures > (much lower than permitted by standards). > No the thread was not about the -rt patch, but I just wanted to spread a little light that it exists. In fact, besides the current problem with the SMP scheduler balancing latency (that exists also in mainline) you should be able to get at least 100us response time on a modest machine. Even when the IDE wants to hog the CPU. -- Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/