Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932147AbWBSRDL (ORCPT ); Sun, 19 Feb 2006 12:03:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932154AbWBSRDL (ORCPT ); Sun, 19 Feb 2006 12:03:11 -0500 Received: from ms-smtp-02.nyroc.rr.com ([24.24.2.56]:5054 "EHLO ms-smtp-02.nyroc.rr.com") by vger.kernel.org with ESMTP id S932147AbWBSRDK (ORCPT ); Sun, 19 Feb 2006 12:03:10 -0500 Date: Sun, 19 Feb 2006 12:02:20 -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: <20060219045716.GA9880@khap> Message-ID: References: <20060205205313.GA9188@kroah.com> <20060219045716.GA9880@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: 1908 Lines: 42 On Sun, 19 Feb 2006, Sasha Khapyorsky wrote: > On 15:24 Thu 16 Feb , s.schmidt@avm.de wrote: > > We are pleased to note that the GPL_EXPORT_SYMBOL fix has been withdrawn. > > This is particularly important for customers who have been relying on good > > driver coverage for ISDN/DSL devices with SUSE distributions over the past > > few years. However, as we understand the ongoing discussion, a number of > > people are tending towards a position of enforcement of USB GPL drivers > > only. We would like to take this opportunity to clarify where we see the > > differences between AVM and other devices and the difficulties regarding a > > possible move towards user mode. > > > > The user space does not ensure the reliability of time critical analog > > services like Fax G3 or analog modem emulations. This quality of service > > can only be guaranteed within the kernel space. > > Soft modems may work pretty well in userspace - slmodem is example. > > Real-time requirement for V.34 is 40ms response time and only once during > the session when echo canceller parameters are negotiatiated (so you may > decrease "buffer size" before and increase after - there are enouph > silence places for such manipulations). Fax itself does not require any > "realtime" AFAIK, other place is almost unused today V.32 - 26ms, also > for echo canceller setup. > 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. but... I would be really interested in knowing how much better a user side driver can work with the -rt patch implemented. I bet it can do rather well. -- 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/