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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EEF5DC433ED for ; Fri, 7 May 2021 03:37:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDAA9613D9 for ; Fri, 7 May 2021 03:37:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231907AbhEGDih convert rfc822-to-8bit (ORCPT ); Thu, 6 May 2021 23:38:37 -0400 Received: from mga01.intel.com ([192.55.52.88]:56341 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231216AbhEGDid (ORCPT ); Thu, 6 May 2021 23:38:33 -0400 IronPort-SDR: 7UkBPj4RSztBsGXCu6rFnoXN00aChrYZT/mdeWoDRgYPt0+r02By0y+OIEfh1ZBllaK/b1WzQY BB/ecmjUbk0g== X-IronPort-AV: E=McAfee;i="6200,9189,9976"; a="219534430" X-IronPort-AV: E=Sophos;i="5.82,279,1613462400"; d="scan'208";a="219534430" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2021 20:37:09 -0700 IronPort-SDR: cfN6Sy07CfqCatK41hnuA7++xRgh/JFuZAkP50YGi2BgMUxK8u15H5GdTDRgKxczfaxPG45k5b iifFInFc/cRw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,279,1613462400"; d="scan'208";a="428842951" Received: from fmsmsx605.amr.corp.intel.com ([10.18.126.85]) by orsmga007.jf.intel.com with ESMTP; 06 May 2021 20:37:08 -0700 Received: from fmsmsx612.amr.corp.intel.com (10.18.126.92) by fmsmsx605.amr.corp.intel.com (10.18.126.85) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 6 May 2021 20:37:08 -0700 Received: from fmsmsx610.amr.corp.intel.com (10.18.126.90) by fmsmsx612.amr.corp.intel.com (10.18.126.92) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Thu, 6 May 2021 20:37:08 -0700 Received: from fmsmsx610.amr.corp.intel.com ([10.18.126.90]) by fmsmsx610.amr.corp.intel.com ([10.18.126.90]) with mapi id 15.01.2106.013; Thu, 6 May 2021 20:37:08 -0700 From: "Luck, Tony" To: Naoya Horiguchi , "linux-mm@kvack.org" , Aili Yao CC: Andrew Morton , Oscar Salvador , David Hildenbrand , Borislav Petkov , Andy Lutomirski , Naoya Horiguchi , Jue Wang , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v3 0/3] mm,hwpoison: fix sending SIGBUS for Action Required MCE Thread-Topic: [PATCH v3 0/3] mm,hwpoison: fix sending SIGBUS for Action Required MCE Thread-Index: AQHXNklUtDziI1+1ZUqZsXGvSliLyarXX3UAgAAW4VA= Date: Fri, 7 May 2021 03:37:07 +0000 Message-ID: <87ba79daaba1416589b203118be096cb@intel.com> References: <20210421005728.1994268-1-nao.horiguchi@gmail.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-reaction: no-action dlp-version: 11.5.1.3 x-originating-ip: [10.1.200.100] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> I updated the series based on previous feedbacks/discussions. > > Tested-by: Tony Luck Maybe this series should get a "Cc: stable" tag too? I don't have a specific commit to provide for Fixes:, but it deals with an issue where sometimes processes return from the machine check handler and hit the same machine check again. It's hard[1] to hit in v5.8, but somehow gets progressively easier in newer versions. -Tony [1] Initially I thought it didn't happen at all in v5.8. Then wasted a bunch of time trying to bisect. But my "git bisect good" responses turned out to be randomly assigned when I just hadn't tried enough times to make the problem show up.