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 BC8CAC4332D for ; Thu, 4 Mar 2021 00:03:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 979D064EEE for ; Thu, 4 Mar 2021 00:03:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353188AbhCDADi (ORCPT ); Wed, 3 Mar 2021 19:03:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1388010AbhCCUXo (ORCPT ); Wed, 3 Mar 2021 15:23:44 -0500 Received: from mail-qk1-x72e.google.com (mail-qk1-x72e.google.com [IPv6:2607:f8b0:4864:20::72e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DCDE9C06175F for ; Wed, 3 Mar 2021 12:23:03 -0800 (PST) Received: by mail-qk1-x72e.google.com with SMTP id a9so10869931qkn.13 for ; Wed, 03 Mar 2021 12:23:03 -0800 (PST) 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 :mime-version; bh=aYIGK66WS1KcA2ZXHhqfbQI3240kSMVHBkovtDH7WnQ=; b=Sby88J53BdDHPl6ryOwymuczmGeC0Ehpj6baNLJ6q/E5MmpUsDOdP2DMoW8TLlOS0P MzWA1qomUvAC5p5+h4tsfyyugqNKhG+BgsowZzvpMPgaBAynHYPKMoD/8uQdVnzl8YG8 1G7bY84o2wPITS5nbto1j+Q6zTNATzfmxb6oQ= 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:mime-version; bh=aYIGK66WS1KcA2ZXHhqfbQI3240kSMVHBkovtDH7WnQ=; b=ewb1AUsCbvJiXyxFkYLaJMKspa38V9gnFUxUWEsvY4mJQYfLy/JahyPsJORiB5pU9f ajPSfi/hvIwNtAGox5C18UdaVdOEEz39nT5aEbWJA5XC2dxb2hDDofuct2NCEA7cbhJm qJLID8e97Yhe67BrUj54i8q0tLoT4MD0Q6mIgO6jPO9zS1LGyqxY9IHIvZ6qwnD5VcH5 gOeMOkqZYIM1h53q7kHxxZq8VqywugVRKrjpsi8NaLSB66BKcMHyoKfxF8yhKATeFcej 5jP8Rvbre3SFgMG10owtUApivMzvtLelb/znZVVMX+02GvWwznd+JCBdNVLSftIingue xJRQ== X-Gm-Message-State: AOAM531wh6TdumXiK4Nkf+jOq2gL2sNKClrVvnoW3VFJItnUsdv4uBxU f0TgEopmRd91hoWP0HnUoZUPfw== X-Google-Smtp-Source: ABdhPJxR94rnbvC/WKPK655xYGFt/+PWcp5ZWzXl2hB/jE6DrwAw+yMmCwRZ1d8KtF7N2Cwnswy3wA== X-Received: by 2002:a37:5088:: with SMTP id e130mr789061qkb.321.1614802982849; Wed, 03 Mar 2021 12:23:02 -0800 (PST) Received: from macbook-air-2.local (weaver.eece.maine.edu. [130.111.218.23]) by smtp.gmail.com with ESMTPSA id p12sm15764423qtw.27.2021.03.03.12.23.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Mar 2021 12:23:02 -0800 (PST) From: Vince Weaver X-Google-Original-From: Vince Weaver Date: Wed, 3 Mar 2021 15:22:57 -0500 (EST) To: "Liang, Kan" cc: Stephane Eranian , Vince Weaver , LKML , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim Subject: Re: [perf] perf_fuzzer causes unchecked MSR access error In-Reply-To: <9df5f72d-a959-fe46-400a-7dca6c596478@linux.intel.com> Message-ID: References: <61a56699-aab4-ef6-ed8d-a22b6bf532d@maine.edu> <7170d3b-c17f-1ded-52aa-cc6d9ae999f4@maine.edu> <32888c33-c286-c600-66cb-8b1b03beeb8b@linux.intel.com> <6c1f8e-f81-a781-e594-368e7adef0c0@maine.edu> <9df5f72d-a959-fe46-400a-7dca6c596478@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 3 Mar 2021, Liang, Kan wrote: > We never use bit 58. It should be a new issue. > Is it repeatable? yes, it's repeatable. (which I'm glad to see because it looks suspiciously like a memory bit flip) Though since it's a WARN_ONCE I have to reboot each time I want to test. If I get a chance I'll try to come up with a reduced test case but probably won't have time for that today. Vince