Received: by 2002:a05:6358:d09b:b0:dc:cd0c:909e with SMTP id jc27csp1387288rwb; Wed, 14 Dec 2022 09:32:15 -0800 (PST) X-Google-Smtp-Source: AA0mqf68jAbmch8AChvB18k/Y+Pe4hDU4i8wwnyWjhDxwQTgK/PK5q0fpGKUHTyFhWxIDItAuCsN X-Received: by 2002:a05:6a20:d696:b0:9d:efbe:2052 with SMTP id it22-20020a056a20d69600b0009defbe2052mr36862806pzb.8.1671039135230; Wed, 14 Dec 2022 09:32:15 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1671039135; cv=none; d=google.com; s=arc-20160816; b=XujGTznfHCAse/HFc0SIwMx59RC5hoIRW6CrGN5Qx477Rk0Ni84m93CdrOp0KUjHey dmou0Ry1ZvflsDWLOjIQgNrAZ0vYRRD73ge7+L9ouM4P8hEefsrpDRO+1WfrYQiaLUe+ lUpk/ROw0kHYJzabzOf7W+m5Nt6rqTCNpfFT6mX591nRMxsJAnTc8EI4Seb9JZ9iKIUJ XJiZ25NIhbVMLeqgl7rcp1BQ1fBXrOI28JpKgmva50Piypz0OTvu+IR84hMEMqYS6c4E shbdGxnTcSsKGcKb824iLj7AgJGaQxSrrtNE8NsxXcasGEgccE+YexDqOqeNKtlx89et RoRA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=eMg0PQc/CptyCiVyI2QqrF+gy5xU5hvKC0+ULtCpJI4=; b=LY6F1BFoTMqgXIfew6qGjjWcvlzm7ptXFlXZyFRRAaT6hCspJZp6z/GkmGkvIp8f/e mhe0D2JiIYPZeDWQGmEc4b5RIBpSscVz4RX8RaTwkm0rMhc6v9cqyxGPSd901vlpHwyq 2pwciJ/mgY1aA0cAAuk1NDsxV37HxdZKHeGJf3XY+eLdQaZaJxQLGtktA4sgec6jI/Fa AG0ILJcdlnchQemJ8ejEL4lLnvy1TTVswpkzyY1CbP0sMSX0vHzkIWOAQ2OOwV+Jxgfs IfuS9v74cqzLWvU6lMBjAII0UUI+QdyAYvbi6O8EencZtOazl9KcV9yNNl2Hi5MdfqNv QcIg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=qtB2VM6l; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id 138-20020a621490000000b00562a1693523si287231pfu.20.2022.12.14.09.32.05; Wed, 14 Dec 2022 09:32:15 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=qtB2VM6l; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237364AbiLNRFG (ORCPT + 69 others); Wed, 14 Dec 2022 12:05:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237443AbiLNRFA (ORCPT ); Wed, 14 Dec 2022 12:05:00 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C41C27FEC for ; Wed, 14 Dec 2022 09:04:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=eMg0PQc/CptyCiVyI2QqrF+gy5xU5hvKC0+ULtCpJI4=; b=qtB2VM6lWBmXcMuWlZvelv2nSx 8TuD0G6LPQcOX6p3eKtVcFSjzhOBLUVlYlMGW9HkEJKdgy5jUUXTJTatQLaCRQJgkKNtdjxLT+OVr 79DD/H4BsbNHDbVy9xWUuB5VO3CZxtT6DVfsuhG0+yD77/8SrXuRNqnbLvvnDh38H2i8Ynk9Y962n ovt5PtxUA93cad9GtUuCgrj5Ol86nrJmKjbLFJ8m1/uIavfjMUGkxQap7GhHZ5IQ0ZV5xQs9FnBrH G18TfdH0ltGymMBxprJr7dlVN18YXb03cG/EWK/sSDla5CYFng9h/hVizFeM/0VSLlNXpIufvt150 AQ+gYNGw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1p5VBb-00DR1p-Ag; Wed, 14 Dec 2022 17:04:51 +0000 Date: Wed, 14 Dec 2022 17:04:51 +0000 From: Matthew Wilcox To: mawupeng Cc: naoya.horiguchi@nec.com, catalin.marinas@arm.com, gregkh@linuxfoundation.org, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [Qestion] UCE on pud-sized hugepage lead to kernel panic on lts5.10 Message-ID: References: <2b4d03bc-2b6e-45b0-655a-58b66672187e@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2b4d03bc-2b6e-45b0-655a-58b66672187e@huawei.com> X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 14, 2022 at 09:33:10AM +0800, mawupeng wrote: > On current arm64 stable 5.10(v5.10.158). If a UCE happnes pud-sized What's a UCE?