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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: quoted-printable MIME-Version: 1.0 X-Rspamd-Queue-Id: 612FAEF Authentication-Results: imf29.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=intel.com (policy=none); spf=none (imf29.hostedemail.com: domain of tony.luck@intel.com has no SPF policy when checking 134.134.136.24) smtp.mailfrom=tony.luck@intel.com X-Rspamd-Server: rspam04 X-Stat-Signature: wgpxmsyjikuawoapaf8htp5tnnupgi1a Received-SPF: none (intel.com>: No applicable sender policy available) receiver=imf29; identity=mailfrom; envelope-from=""; helo=mga09.intel.com; client-ip=134.134.136.24 X-HE-DKIM-Result: none/none X-HE-Tag: 1620358627-414991 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: >> 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 bunc= h 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.