Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759575AbXIOIxS (ORCPT ); Sat, 15 Sep 2007 04:53:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751175AbXIOIxL (ORCPT ); Sat, 15 Sep 2007 04:53:11 -0400 Received: from ug-out-1314.google.com ([66.249.92.169]:39251 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750838AbXIOIxK (ORCPT ); Sat, 15 Sep 2007 04:53:10 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=tCsIp9ncshQaZqhjRDgtEz1CmlkNQr6QjCU7xY7zvaAtiuM8CsZl8r+P7YCfw7gbcImrdMNRP+ejDa8TvBsMfYsDdkTExnQBfWbA3yWXiLiIvoLYreRBrGNreqN9YcTFniiOAwifkTRghJQ3yscySVOs5TEvLg8Fiok86RYA8Oc= Message-ID: <46EB9D6B.4040009@gmail.com> Date: Sat, 15 Sep 2007 12:52:59 +0400 From: Manu Abraham User-Agent: Thunderbird 1.5.0.13 (X11/20070824) MIME-Version: 1.0 To: Markus Rechberger CC: Johannes Stezenbach , Steven Toth , "video4linux-list@redhat.com" , "linux-dvb@linuxtv.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" Subject: Re: [linux-dvb] [PATCH] Userspace tuner References: <20070913131353.GB26972@linuxtv.org> <46E95C54.4060502@gmail.com> <46E99F36.8090809@hauppauge.com> <46E9DDC7.4000403@hauppauge.com> <20070914113838.GA29962@linuxtv.org> <20070914204343.GA9058@linuxtv.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1869 Lines: 46 Hello Markus, Markus Rechberger wrote: > The main discussion in this thread was about drivers in userspace > are bad because the API will allow binary drivers. The guy > who works for Hauppauge (again I also have good contacts > at Hauppauge Europe) writes it's bad - for no technical reason. AFAICS, Steven raised the same thoughts what i had. > If someone points out that it is bad (after reading the whole thread) > why don't we put X.org, bash, well everything into the kernel? I am not saying that userspace is bad. In fact i am all for userspace, _if_ there is much of a complication. For example we have had largely complex devices. You might like to read this thread a while back. This was the reason why we started up libdvbapi/mti (For those who don't know what it is, libdvbapi/mti is a userspace approach for having device support in userspace with complicated tuning algorithms with a lot of calculations) http://search.gmane.org/?query=Re%3A+%5BRFC%5D+Userspace+extensions%2C+was+Re%3A+%5Blinux-dvb%5D+%5Bpatch%5D+Add+support+for+different+tuning+algorithms&author=&group=linux.drivers.dvb&sort=relevance&DEFAULTOP=and&query= For that demodulator and a successor for the same, i had finally moved the same to in kernel with a lot of trouble. Maybe it is not as precise as it should have been. But what i mean is that we should use such approaches if there needs to be a heavy valid reason and if there are many more devices going that way, we should definitely move to userspace. Maybe the userspace idea is a bit still immature. That said, i don't see any such complexities with the XC3028 Manu - 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/