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 82A17C433DB for ; Wed, 13 Jan 2021 17:35:26 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id AC5262313C for ; Wed, 13 Jan 2021 17:35:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC5262313C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E14B98D007C; Wed, 13 Jan 2021 12:35:23 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DC4CC8D006A; Wed, 13 Jan 2021 12:35:23 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CB3D98D007C; Wed, 13 Jan 2021 12:35:23 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0057.hostedemail.com [216.40.44.57]) by kanga.kvack.org (Postfix) with ESMTP id B14108D006A for ; Wed, 13 Jan 2021 12:35:23 -0500 (EST) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 295B73630 for ; Wed, 13 Jan 2021 17:35:23 +0000 (UTC) X-FDA: 77701453326.10.coal78_34018282751f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin10.hostedemail.com (Postfix) with ESMTP id 006BD16A4B7 for ; Wed, 13 Jan 2021 17:35:22 +0000 (UTC) X-HE-Tag: coal78_34018282751f X-Filterd-Recvd-Size: 2746 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf21.hostedemail.com (Postfix) with ESMTP for ; Wed, 13 Jan 2021 17:35:22 +0000 (UTC) Received: from zn.tnic (p200300ec2f0b5c0053dfdcdd1c139e2a.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:5c00:53df:dcdd:1c13:9e2a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 232D51EC0423; Wed, 13 Jan 2021 18:35:20 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1610559320; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=/3T6QFfwHjFkS46R1R7ZQPZXm5mIVSC76XwFoUlM36E=; b=Ruy7bE1qzP/kf7ID5j82Bj7qJHGCYr4k2b+4Oj1HWXno6L1i3A7livpduIr648LIBtQySu LqeOAwQdfhTIN6lao7YG/4t/jDFMH8/f3/y59YvXclHgo8vsUuwPxY7tJdnj4GvdOh0r/6 lAYxrWdWz2WkBtJgh3CW3ZInID4y2tk= Date: Wed, 13 Jan 2021 18:35:15 +0100 From: Borislav Petkov To: "Luck, Tony" Cc: Andy Lutomirski , Andy Lutomirski , X86 ML , Andrew Morton , Peter Zijlstra , Darren Hart , LKML , linux-edac , Linux-MM Subject: Re: [PATCH v2 1/3] x86/mce: Avoid infinite loop for copy from user recovery Message-ID: <20210113173515.GF16960@zn.tnic> References: <20210113015053.GA21587@agluck-desk2.amr.corp.intel.com> <20210113100009.GA16960@zn.tnic> <8c4cd08e82884518b607f392523dd70b@intel.com> <20210113161933.GE16960@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jan 13, 2021 at 04:32:54PM +0000, Luck, Tony wrote: > I'll work on it. We tend not to have essay length messages as panic() strings. But I can > add a comment in the code there so that people who grep whatever panic message > we choose can get more details on what happened and what to do. I did not mean to write an essay but to simply make it more palatable for "normal" users. Something like: "PANIC: Second machine check exception while accessing user data." or along those lines to explain *why* the machine panics. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette