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=-2.1 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_MUTT autolearn=ham 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 A8D35C433F5 for ; Wed, 5 Sep 2018 08:52:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 457C32075E for ; Wed, 5 Sep 2018 08:52:29 +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="Z8Wu6BS8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 457C32075E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727944AbeIENVi (ORCPT ); Wed, 5 Sep 2018 09:21:38 -0400 Received: from merlin.infradead.org ([205.233.59.134]:58434 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726401AbeIENVi (ORCPT ); Wed, 5 Sep 2018 09:21:38 -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=euO650ErHHFroJgFxx9JP66Mh2PFJ0AdVManSkZHYjE=; b=Z8Wu6BS8wUbfIjZZ8hIQEMGhx k/QnOBI7d9CD5AkKqx0bZjxT+A8kobj7vGIw0EBPOMQcWpXU/FbrN4NtEu8AgNFaEreUcL/I6/lwa mcFHSUGBezWLZU7QQzFwb6FN99OStmvK/yYETq4X3bxLU2J92cexp9BAh2gKOqKpvhZwgoRd27vkt jwmRTpA0jRDuZ/p0vFXgacm+ZnsQZqCAeoAOiQN8WQYvD50zEeBX72RQKg2HSB9uWjIhHdXId6ZMY sWhkp6bfpfqPxE7rv+mUNo6o4Ls3tSXIxrWpLSS4vA9bBKvSAMd02KPOob+RmZ1ixbttEG1W0mofw InySy7CPg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fxTXq-00042M-9u; Wed, 05 Sep 2018 08:52:14 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id D018A20191BFB; Wed, 5 Sep 2018 10:52:12 +0200 (CEST) Date: Wed, 5 Sep 2018 10:52:12 +0200 From: Peter Zijlstra To: Eduardo Valentin Cc: Andi Kleen , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Kan Liang , Dan Carpenter , Jia Zhang , Greg Kroah-Hartman , linux-kernel@vger.kernel.org Subject: Re: [PATCHv2 1/1] perf/x86/intel: make error messages less confusing Message-ID: <20180905085212.GS24124@hirez.programming.kicks-ass.net> References: <20180823150732.11249-1-eduval@amazon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180823150732.11249-1-eduval@amazon.com> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 23, 2018 at 08:07:32AM -0700, Eduardo Valentin wrote: > On a system with X86_FEATURE_ARCH_PERFMON disabled > and with a model not known by family PMU drivers, > user gets a kernel message log like the following: > [ 0.100114] Performance Events: unsupported p6 CPU model 85 no PMU driver, software events only. > > The "unsupported .. CPU" part may be confusing for some > users leading to wrong understanding that the kernel > does not support the CPU model. Send them back to first grade, such that they might learn to read?