From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751324AbcBKP3n (ORCPT ); Thu, 11 Feb 2016 10:29:43 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:33785 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751005AbcBKP3l (ORCPT ); Thu, 11 Feb 2016 10:29:41 -0500 Date: Thu, 11 Feb 2016 16:29:35 +0100 From: Peter Zijlstra To: "Rafael J. Wysocki" Cc: "Rafael J. Wysocki" , Steve Muckle , Linux PM list , Linux Kernel Mailing List , Srinivas Pandruvada , Viresh Kumar , Juri Lelli , Thomas Gleixner Subject: Re: [PATCH 0/3] cpufreq: Replace timers with utilization update callbacks Message-ID: <20160211152935.GN6357@twins.programming.kicks-ass.net> References: <3071836.JbNxX8hU6x@vostro.rjw.lan> <56B93548.9090006@linaro.org> <5387313.xAhVpzgZCg@vostro.rjw.lan> <20160211115157.GH6357@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Thu, Feb 11, 2016 at 01:08:28PM +0100, Rafael J. Wysocki wrote: > > Not really pretty though. It blows a bit that you require this callback > > to be periodic (in order to replace a timer). > > We need it for now, but that's because of how things work on the cpufreq side. Right, maybe stick a big comment on cpufreq_trigger_update() noting its a big ugly hack and will go away 'soon'. > The last version is here: > > https://patchwork.kernel.org/patch/8275271/ > > but it has the additional hooks for RT/DL which you seem to be > thinking are a mistake. As long as we make sure everbody knows they're a band-aid and will be taken out back and shot that should be fine for a little while I suppose.