Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755284AbdGKGjz (ORCPT ); Tue, 11 Jul 2017 02:39:55 -0400 Received: from mail-pf0-f182.google.com ([209.85.192.182]:33209 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754126AbdGKGjx (ORCPT ); Tue, 11 Jul 2017 02:39:53 -0400 Date: Tue, 11 Jul 2017 12:09:44 +0530 From: Viresh Kumar To: "Rafael J. Wysocki" Cc: Dietmar Eggemann , Peter Zijlstra , "Rafael J. Wysocki" , Linux Kernel Mailing List , Linux PM , Russell King - ARM Linux , Greg Kroah-Hartman , Russell King , Catalin Marinas , Will Deacon , Juri Lelli , Vincent Guittot , Morten Rasmussen Subject: Re: [PATCH v2 02/10] cpufreq: provide data for frequency-invariant load-tracking support Message-ID: <20170711063944.GA17115@vireshk-i7> References: <20170706094948.8779-1-dietmar.eggemann@arm.com> <12829054.TWIodSo4bb@aspire.rjw.lan> <20170710065443.GG2928@vireshk-i7> <4673356.gkeX7KYvlb@aspire.rjw.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4673356.gkeX7KYvlb@aspire.rjw.lan> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 529 Lines: 15 On 10-07-17, 14:46, Rafael J. Wysocki wrote: > This particular change is about a new feature, so making it in the core is OK > in two cases IMO: (a) when you actively want everyone to be affected by it and IMO this change should be done for the whole ARM architecture. And if some regression happens due to this, then we come back and solve it. > (b) when the effect of it on the old systems should not be noticeable. I am not sure about the effects of this on performance really. @Dietmar: Any inputs for that ? -- viresh