Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263291AbUJ2Cc3 (ORCPT ); Thu, 28 Oct 2004 22:32:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263256AbUJ2C36 (ORCPT ); Thu, 28 Oct 2004 22:29:58 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:29667 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S263168AbUJ2AHZ (ORCPT ); Thu, 28 Oct 2004 20:07:25 -0400 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4 From: Lee Revell To: Rui Nuno Capela Cc: Ingo Molnar , linux-kernel@vger.kernel.org, mark_h_johnson@raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese In-Reply-To: <32806.192.168.1.5.1099007364.squirrel@192.168.1.5> References: <12917.195.245.190.94.1098890763.squirrel@195.245.190.94> <20041027205126.GA25091@elte.hu> <20041027211957.GA28571@elte.hu> <33083.192.168.1.5.1098919913.squirrel@192.168.1.5> <20041028063630.GD9781@elte.hu> <20668.195.245.190.93.1098952275.squirrel@195.245.190.93> <20041028085656.GA21535@elte.hu> <26253.195.245.190.93.1098955051.squirrel@195.245.190.93> <20041028093215.GA27694@elte.hu> <43163.195.245.190.94.1098981230.squirrel@195.245.190.94> <20041028191605.GA3877@elte.hu> <32806.192.168.1.5.1099007364.squirrel@192.168.1.5> Content-Type: text/plain Date: Thu, 28 Oct 2004 20:07:23 -0400 Message-Id: <1099008443.4199.8.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 947 Lines: 25 On Fri, 2004-10-29 at 00:49 +0100, Rui Nuno Capela wrote: > > plus i've also got questions about how Jackd interfaces with ALSA: does > > it use SIGIO, or some direct driver ioctl? If SIGIO is used then how is > > it done precisely - is an 'RT' queued signal used or ordinary SIGIO? > > Also, how is the 'channel' information established upon getting a SIGIO, > > is it in the siginfo structure? > > > > Now that's really pushing me over. Any ALSA-JACK developers around here to > comment? > I think it uses a direct driver ioctl to open the device. Then jack uses mmap to talk to the audio device. Anyway I forwarded your question to Paul Davis, the author of JACK, and cc'ed jackit-devel. Lee - 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/