Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761329AbXERXuN (ORCPT ); Fri, 18 May 2007 19:50:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755140AbXERXuA (ORCPT ); Fri, 18 May 2007 19:50:00 -0400 Received: from mail-in-13.arcor-online.net ([151.189.21.53]:57096 "EHLO mail-in-13.arcor-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755003AbXERXuA (ORCPT ); Fri, 18 May 2007 19:50:00 -0400 In-Reply-To: <1179530872.32247.423.camel@localhost.localdomain> References: <200705172142.26739.sshtylyov@ru.mvista.com> <464CB071.5050504@ru.mvista.com> <9095839480a9686d9c40aa6143edb804@kernel.crashing.org> <464CB460.40905@ru.mvista.com> <97d47c2261fe9cd3f1a6c864278a6ab6@kernel.crashing.org> <1179464690.32247.370.camel@localhost.localdomain> <1179466769.3658.0.camel@localhost.localdomain> <1179472096.32247.394.camel@localhost.localdomain> <464DAD06.2060504@ru.mvista.com> <1179530872.32247.423.camel@localhost.localdomain> Mime-Version: 1.0 (Apple Message framework v623) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <51b3a75638604c9dd7ed60a10f0ed934@kernel.crashing.org> Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, Dave Liu , Sergei Shtylyov , linuxppc-dev@ozlabs.org, tglx@linutronix.de From: Segher Boessenkool Subject: Re: [PATCH 2.6.21-rt2] PowerPC: decrementer clockevent driver Date: Sat, 19 May 2007 01:49:59 +0200 To: Benjamin Herrenschmidt X-Mailer: Apple Mail (2.623) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 699 Lines: 19 > I find it extremely silly to implement it as edge anyway. The EE line > is > level triggered, and having a mix of edge and level on the same > exception without a clean way to retrigger the DEC one other than > waiting one tick is just causing trouble. It isn't edge triggered, it just automatically clears the decrementer exception condition at its source when taken (on certain implementations -- others leave it to software to clear it). Segher - 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/