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 9E0E9C433E6 for ; Wed, 13 Jan 2021 16:19:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E699123339 for ; Wed, 13 Jan 2021 16:19:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E699123339 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 497928D0061; Wed, 13 Jan 2021 11:19:45 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 448B38D002E; Wed, 13 Jan 2021 11:19:45 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2E8E88D0061; Wed, 13 Jan 2021 11:19:45 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0200.hostedemail.com [216.40.44.200]) by kanga.kvack.org (Postfix) with ESMTP id 1572F8D002E for ; Wed, 13 Jan 2021 11:19:45 -0500 (EST) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 08E8A3630 for ; Wed, 13 Jan 2021 16:19:44 +0000 (UTC) X-FDA: 77701262688.13.dolls25_01101982751f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id 36F9E18140B60 for ; Wed, 13 Jan 2021 16:19:43 +0000 (UTC) X-HE-Tag: dolls25_01101982751f X-Filterd-Recvd-Size: 2692 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf03.hostedemail.com (Postfix) with ESMTP for ; Wed, 13 Jan 2021 16:19:40 +0000 (UTC) Received: from zn.tnic (p200300ec2f0b5c000beb6f45064fc5e6.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:5c00:beb:6f45:64f:c5e6]) (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 63EAC1EC0423; Wed, 13 Jan 2021 17:19:38 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1610554778; 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=eVu6NTzQCbZz8vK7G6SGItsBTLYbKoEYIb4z/KFByVs=; b=a5f4xecG0yBOEpwuzvLoInAieudYWctDOPEHLxFhQrYhpuUpi92wpClEA5qmLF/vay7J93 pYqFOwenhraD/2goJJBwZrOdQLhmjLkkt8ALrL5FciHn40wLtyA01nUoeT1f8A1rOC6Pws pee4Jm8N5F0h+6argliebmolMXRvsek= Date: Wed, 13 Jan 2021 17:19:33 +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: <20210113161933.GE16960@zn.tnic> References: <20210113015053.GA21587@agluck-desk2.amr.corp.intel.com> <20210113100009.GA16960@zn.tnic> <8c4cd08e82884518b607f392523dd70b@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <8c4cd08e82884518b607f392523dd70b@intel.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000015, 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 04:06:09PM +0000, Luck, Tony wrote: > Maybe the other difference in approach between Andy and me is whether to > go for a solution that covers all the corner cases, or just make an incremental > improvement that allows for recover in some useful subset of remaining fatal > cases, but still dies in other cases. Does that mean more core code surgery? > I'm happy to replace error messages with ones that are more descriptive and > helpful to humans. Yap, that: "Multiple copyin" with something more understandable to users... Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette