From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8F2AC3A5A5 for ; Thu, 5 Sep 2019 11:48:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D90620870 for ; Thu, 5 Sep 2019 11:48:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="l7Eg1C+x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387487AbfIELsN (ORCPT ); Thu, 5 Sep 2019 07:48:13 -0400 Received: from merlin.infradead.org ([205.233.59.134]:44472 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730780AbfIELsN (ORCPT ); Thu, 5 Sep 2019 07:48:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=iEbOxOap8B1HWjnyhtZ/w/G2kvt1iAs8NLk2E8XSKKE=; b=l7Eg1C+xAZYtgRdUXyvasoQJQ tkQvAqioMrNsDvVawB6736M47qPYtIYhtLkbrg3j4R0Ai9ioGjvqxl9bTJ1Yf3Y02zD9wBf2HHZOZ cg1mbvtRiIyKHNmeyRK8SnyAy0FBEVHHt4KDj7fKzM5FuPo/4x/tBDRBIGbzg0gqc+097fSh9kff3 jkwP2Z45CPRmro+AcxREVzEuyyzEg4klHwCpudHG+zLuxYKzNLR9jecWe8BM6JAdpmrVp9ytN+/va BWCEsr1sHLfJZ7p5hyZUOadCpBp+psTtfqZ2+Ltltrxcfrr4SJH+HPV8LVQCPGCUVTQN3Z0DDMCGS 4pOzjLB9w==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1i5qFA-0006fU-8R; Thu, 05 Sep 2019 11:48:04 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id CC9023011DF; Thu, 5 Sep 2019 13:47:25 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id CA8A729CD3392; Thu, 5 Sep 2019 13:48:02 +0200 (CEST) Date: Thu, 5 Sep 2019 13:48:02 +0200 From: Peter Zijlstra To: Patrick Bellasi Cc: Qais Yousef , Subhra Mazumdar , linux-kernel@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de, steven.sistare@oracle.com, dhaval.giani@oracle.com, daniel.lezcano@linaro.org, vincent.guittot@linaro.org, viresh.kumar@linaro.org, tim.c.chen@linux.intel.com, mgorman@techsingularity.net, parth@linux.ibm.com Subject: Re: [RFC PATCH 1/9] sched,cgroup: Add interface for latency-nice Message-ID: <20190905114802.GN2349@hirez.programming.kicks-ass.net> References: <20190830174944.21741-1-subhra.mazumdar@oracle.com> <20190830174944.21741-2-subhra.mazumdar@oracle.com> <20190905083127.GA2332@hirez.programming.kicks-ass.net> <87r24v2i14.fsf@arm.com> <20190905104616.GD2332@hirez.programming.kicks-ass.net> <20190905111346.2w6kuqrdvaqvgilu@e107158-lin.cambridge.arm.com> <20190905113002.GK2349@hirez.programming.kicks-ass.net> <87ftlb2cq6.fsf@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87ftlb2cq6.fsf@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 05, 2019 at 12:40:01PM +0100, Patrick Bellasi wrote: > Right, although I think behaviours could still be exported but via a > different and configurable interface, using thresholds. I would try _really_ hard to avoid pinning down behaviour. The more you do that, the less you can change.