From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759564AbbIDPlm (ORCPT ); Fri, 4 Sep 2015 11:41:42 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:52117 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759227AbbIDPlk (ORCPT ); Fri, 4 Sep 2015 11:41:40 -0400 Date: Fri, 4 Sep 2015 17:41:33 +0200 From: Peter Zijlstra To: Richard Cochran Cc: Thomas Gleixner , "Hall, Christopher S" , "Kirsher, Jeffrey T" , "hpa@zytor.com" , "mingo@redhat.com" , "john.stultz@linaro.org" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "netdev@vger.kernel.org" , "intel-wired-lan@lists.osuosl.org" Subject: Re: [PATCH v3 1/4] Add correlated clocksource deriving system time from an auxiliary clocksource Message-ID: <20150904154133.GI18489@twins.programming.kicks-ass.net> References: <1440183128-1384-1-git-send-email-christopher.s.hall@intel.com> <1440183128-1384-2-git-send-email-christopher.s.hall@intel.com> <20150904151021.GF18489@twins.programming.kicks-ass.net> <20150904151743.GB16862@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150904151743.GB16862@localhost.localdomain> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 04, 2015 at 05:17:43PM +0200, Richard Cochran wrote: > On Fri, Sep 04, 2015 at 05:10:21PM +0200, Peter Zijlstra wrote: > > I think what they're getting at is asking if there's a rate limit to > > time adjustments, without that, saving the last n transition points will > > still not cover any given length of history. > > As if the ntp code isn't complex enough already - now we're adding > sample histories and adjustment rating limiting? > > And all for some unknown DSP in a mythical sound card?? Hehe, I'm just a 'translator' here. But going by you answer I'm taking it there isn't in fact a rate-limit to adjustments. Which, even if you were not opposed to that direction, makes it an unfeasible proposition. Also, I'm not thinking its too mythical, sound/soc/intel/ is full of audio DSP stuff, I think a newer version will just gain ART support.