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=-3.8 required=3.0 tests=BAYES_00, 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 44243C433ED for ; Tue, 20 Apr 2021 15:43:00 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BC58261264 for ; Tue, 20 Apr 2021 15:42:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BC58261264 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2E6D16B006C; Tue, 20 Apr 2021 11:42:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2BEB66B006E; Tue, 20 Apr 2021 11:42:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 185196B0070; Tue, 20 Apr 2021 11:42:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0103.hostedemail.com [216.40.44.103]) by kanga.kvack.org (Postfix) with ESMTP id F0F4D6B006C for ; Tue, 20 Apr 2021 11:42:58 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id AE362180AD822 for ; Tue, 20 Apr 2021 15:42:58 +0000 (UTC) X-FDA: 78053163636.08.A6078C1 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by imf21.hostedemail.com (Postfix) with ESMTP id DE2D7E000126 for ; Tue, 20 Apr 2021 15:42:54 +0000 (UTC) IronPort-SDR: EkVEFrcvnfiXCkX6qNbKh2Hsrb0fWYOtI8HystGFFpN6xzSQlbEmEZnP3wZ/OfgRG6EDe0/omR TeyfI8QgtY1g== X-IronPort-AV: E=McAfee;i="6200,9189,9960"; a="195643359" X-IronPort-AV: E=Sophos;i="5.82,237,1613462400"; d="scan'208";a="195643359" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2021 08:42:54 -0700 IronPort-SDR: unoWFt/RJnmiNcieQXJzY2Un2GpMb8M25Wd5f9DCUQMOSqY73zRfHS7OsDFcKoXfh2MUxDnl0O psuXPIu7ydRg== X-IronPort-AV: E=Sophos;i="5.82,237,1613462400"; d="scan'208";a="523853448" Received: from agluck-desk2.sc.intel.com (HELO agluck-desk2.amr.corp.intel.com) ([10.3.52.146]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2021 08:42:54 -0700 Date: Tue, 20 Apr 2021 08:42:53 -0700 From: "Luck, Tony" To: Jue Wang Cc: nao.horiguchi@gmail.com, akpm@linux-foundation.org, bp@alien8.de, david@redhat.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, luto@kernel.org, naoya.horiguchi@nec.com, osalvador@suse.de, yaoaili@kingsoft.com Subject: Re: [PATCH v1 3/3] mm,hwpoison: add kill_accessing_process() to find error virtual address Message-ID: <20210420154253.GA577572@agluck-desk2.amr.corp.intel.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: 3qp7ns8m8ip5e8jerr97rstwgmx6c7uc X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: DE2D7E000126 Received-SPF: none (intel.com>: No applicable sender policy available) receiver=imf21; identity=mailfrom; envelope-from=""; helo=mga09.intel.com; client-ip=134.134.136.24 X-HE-DKIM-Result: none/none X-HE-Tag: 1618933374-818065 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 Mon, Apr 19, 2021 at 06:49:15PM -0700, Jue Wang wrote: > On Tue, 13 Apr 2021 07:43:20 +0900, Naoya Horiguchi wrote: > ... > > + * This function is intended to handle "Action Required" MCEs on already > > + * hardware poisoned pages. They could happen, for example, when > > + * memory_failure() failed to unmap the error page at the first call, or > > + * when multiple Action Optional MCE events races on different CPUs with > > + * Local MCE enabled. > > +Tony Luck > > Hey Tony, I thought SRAO MCEs are broadcasted to all cores in the system > as they come without an execution context, is it correct? > > If Yes, Naoya, I think we might want to remove the comments about the > "multiple Action Optional MCE racing" part. Jue, Correct. SRAO machine checks are broadcast. But rather than remove the second part, just replace with "multiple local machine checks on different CPUs". -Tony