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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 F39D5C10F0E for ; Tue, 9 Apr 2019 16:38:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C43E32084F for ; Tue, 9 Apr 2019 16:38:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=maine.edu header.i=@maine.edu header.b="JQNFumXC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726623AbfDIQic (ORCPT ); Tue, 9 Apr 2019 12:38:32 -0400 Received: from mail-qt1-f194.google.com ([209.85.160.194]:39558 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726493AbfDIQic (ORCPT ); Tue, 9 Apr 2019 12:38:32 -0400 Received: by mail-qt1-f194.google.com with SMTP id t28so20544284qte.6 for ; Tue, 09 Apr 2019 09:38:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=maine.edu; s=google; h=from:date:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=TygSzTJ+I/CEp5Mg1tpP59nPmXk+fXHFoMxmiRUysyM=; b=JQNFumXCfRo/hz/ku/JRPbbR0nKnmcT+L5xWQemqh7s0rFh8Dd6pkKg6baQ32ZfXTC FLWfIfzZeMSpUIQZIMOpd3m2VrdLFO4DcQcafceu8ZAOXHrBMFcyhaiqT1pLEvveBen1 wBjnhs1QiOPgAwofwc5wEpPH7WBNqAnWgT5nM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=TygSzTJ+I/CEp5Mg1tpP59nPmXk+fXHFoMxmiRUysyM=; b=kBjQ4/0HqdUc81wPRBzp3xZ8Zs847fFdKyOyrJg6TYRVQKaeVOBzBv9uwkxS4tc9Xh c//DEtZukV6pWrRQtFhKNi5u/3Nl1L88Spopb1WrgSnlDRFE704aNTlo9pph3woduQLv fVtw+5r8JLxx+j31mohuol7sL/YcIAsS/uPYToCn9eBTWWDBv6irZLFWhXtvLxXm3fYz zX76zqOLe7hBffo90uLn4IS17yb07CckY7HEE5NCTYW5D7ECbKWzBPP+Tx8Dmtuf2/bl 6cMVyPMCUMtmjdrDGJ0IzeNuloqAKkZOCnbUNOwadjMAYidR5lNfxVXQUg/eys5Rwhck d9oA== X-Gm-Message-State: APjAAAWnSt2UtdCorfDEpAWs/PHcnWx8bZxxKwDZquH9OqXkm4Qtt0Ei 4i7n8iL0dxufxixUzMvfiW2pwg== X-Google-Smtp-Source: APXvYqwngCNFHoLOd0U049twPQUUbYwPaHam/YL2uZ8uWFOwEcyhE8VZf7eSZKkP2fwVrE2duDl2hw== X-Received: by 2002:aed:23b4:: with SMTP id j49mr30593955qtc.175.1554827911030; Tue, 09 Apr 2019 09:38:31 -0700 (PDT) Received: from macbook-air (weaver.eece.maine.edu. [130.111.218.23]) by smtp.gmail.com with ESMTPSA id c207sm17799868qkg.14.2019.04.09.09.38.28 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 09 Apr 2019 09:38:29 -0700 (PDT) From: Vince Weaver X-Google-Original-From: Vince Weaver Date: Tue, 9 Apr 2019 12:38:25 -0400 (EDT) X-X-Sender: vince@macbook-air To: Cyrill Gorcunov cc: Vince Weaver , Peter Zijlstra , linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Alexander Shishkin , Ingo Molnar , Borislav Petkov , Namhyung Kim , Thomas Gleixner , Jiri Olsa , Stephane Eranian Subject: Re: perf: perf_fuzzer crashes on Pentium 4 systems In-Reply-To: <20190407202055.GX1421@uranus.lan> Message-ID: References: <20190403191944.GH1421@uranus.lan> <20190403203144.GI1421@uranus.lan> <20190404133327.GP1421@uranus.lan> <20190404164700.GR1421@uranus.lan> <20190404202038.GT1421@uranus.lan> <20190407202055.GX1421@uranus.lan> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 7 Apr 2019, Cyrill Gorcunov wrote: > Vince, could you please disable alias events and see if it change > anything, once you have time? Note once we've aliases disabled the > counter for cpu cycles get used for NMI watchdog so PERF_COUNT_HW_CPU_CYCLES > won't be available in "perf" tool itself, but I guess perf_fuzzer uses > direct kernel syscall. > --- > arch/x86/events/intel/p4.c | 2 ++ > 1 file changed, 2 insertions(+) > > Index: linux-tip.git/arch/x86/events/intel/p4.c > =================================================================== > --- linux-tip.git.orig/arch/x86/events/intel/p4.c > +++ linux-tip.git/arch/x86/events/intel/p4.c > @@ -622,6 +622,8 @@ static u64 p4_get_alias_event(u64 config > u64 config_match; > int i; > > + return 0; > + > /* > * Only event with special mark is allowed, > * we're to be sure it didn't come as malformed > It still crashes at the same place with this patch and my reproducible test case. Vince