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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 0F79EC433DB for ; Mon, 11 Jan 2021 14:05:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D56F12242A for ; Mon, 11 Jan 2021 14:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388263AbhAKOE6 (ORCPT ); Mon, 11 Jan 2021 09:04:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388275AbhAKOEx (ORCPT ); Mon, 11 Jan 2021 09:04:53 -0500 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A931CC061786 for ; Mon, 11 Jan 2021 06:04:12 -0800 (PST) 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; bh=v/HbyBeVP3vzhsHV3kOkOVfJbOTtBbqnmlMmoz2Pur0=; b=PY4uKRFggb7iM+Xq1unBrxI7Cl fKWR5iaAVFLHSKHxxCs6QpSav05GkQX7zGsiCYcDfbvEe4RE8wXab0GObH8qmn8co51DwHXDRd1vo Zp0o0d/5l0QZQvpFnpOxzPOI8wGVSSxpEKezAfTwbHzKhJMplPTkN12X2bQECAhaxQfrydC6E/H7S usUjMmEK51OvR2z9vs5EOZYlCp3tK4Ght/H4o/c+uDBQ+zlQLUMl8TbhCTEyM/nobWFGAxrlLljUn fT+0wmVHEXObtTgzjPco+/jKMrip3DFvnRJ6DU6ZZmeTXy61nbXWEB23b1QqrtKYsyyZEUajGCv4S b8ly/74w==; 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 #3 (Red Hat Linux)) id 1kyxnj-00071Z-4Q; Mon, 11 Jan 2021 14:04:07 +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 397393010C8; Mon, 11 Jan 2021 15:04:05 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 1AD2320167A86; Mon, 11 Jan 2021 15:04:05 +0100 (CET) Date: Mon, 11 Jan 2021 15:04:05 +0100 From: Peter Zijlstra To: Qais Yousef Cc: Phil Auld , Dietmar Eggemann , vincent.donnefort@arm.com, mingo@redhat.com, vincent.guittot@linaro.org, linux-kernel@vger.kernel.org, valentin.schneider@arm.com Subject: Re: [PATCH v2] sched/debug: Add new tracepoint to track cpu_capacity Message-ID: References: <1598605249-72651-1-git-send-email-vincent.donnefort@arm.com> <20200828102724.wmng7p6je2pkc33n@e107158-lin.cambridge.arm.com> <1e806d48-fd54-fd86-5b3a-372d9876f360@arm.com> <20200828172658.dxygk7j672gho4ax@e107158-lin.cambridge.arm.com> <58f5d2e8-493b-7ce1-6abd-57705e5ab437@arm.com> <20200902135423.GB93959@lorien.usersys.redhat.com> <20200907110223.gtdgqod2iv2w7xmg@e107158-lin.cambridge.arm.com> <20200908131954.GA147026@lorien.usersys.redhat.com> <20210104182642.xglderapsfrop6pi@e107158-lin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210104182642.xglderapsfrop6pi@e107158-lin> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 04, 2021 at 06:26:42PM +0000, Qais Yousef wrote: > So I have a proper patch for that now, that actually turned out to be really > tiny once you untangle exactly what is missing. > > Peter, bpf programs aren't considered ABIs AFAIK, do you have concerns about > that? In order to use these you need to rely on BTF to get anything useful done right? And anything that relies on BTF cannot be ABI.