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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8833CC433EF for ; Mon, 29 Nov 2021 02:57:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 075516B0071; Sun, 28 Nov 2021 21:57:23 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 024506B0072; Sun, 28 Nov 2021 21:57:22 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E2E1B6B0073; Sun, 28 Nov 2021 21:57:22 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id D2A2C6B0071 for ; Sun, 28 Nov 2021 21:57:22 -0500 (EST) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 9732C80C5EC6 for ; Mon, 29 Nov 2021 02:57:12 +0000 (UTC) X-FDA: 78860456304.02.15DBCD1 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) by imf05.hostedemail.com (Postfix) with ESMTP id CC0FC508BB88 for ; Mon, 29 Nov 2021 02:57:02 +0000 (UTC) Received: by mail-wm1-f47.google.com with SMTP id p18so13381284wmq.5 for ; Sun, 28 Nov 2021 18:57:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=9AsJNoK7rAciESn25LHlxP2wCJ43zmCSYQcAT99BBd4=; b=htvwyxeWFujBvpV38LdgUriE31SgAwI4A6ut9fRWCTcnco0y1zb/hHmGxyzBW+2waO 0QXXYRoBIGdsVIU2l2juztuHrFYtKlnAviVM8fyp9vUrNrHky+T1et0lT//KCq5tVfCg XAA0aTHyPI/j7adUHsIyq5GQ03aLeRX4ArhoY0umSYJRQLy2QZTXMXHdAEWkgfhv189A QpORCdpX+UvE/Zte0nIKMn13OFukv1x6Tfmo8dP0WaLCsv5DbeD41HKsEpVioMYz4HW2 1Azkylfj7chjrrBZQ5kUq650UuT3jfTRIV5ZAHZu7i3wbGG8SyNXmKbY1RISrnZXRSQI Bcsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=9AsJNoK7rAciESn25LHlxP2wCJ43zmCSYQcAT99BBd4=; b=raxgl22w3TH8xqtEw+OBqxQBujhf2CP2hoFahgQHHoqsy5zIfSZpZ01B7lN8dtXgq6 bZUn9tirXlJhEMRWQsvrNNO9JIgY2nFcHQwIqKTDIRRW5DzUeRU0iBkj1grAc+SaXpNv IljyG+FFGKaIacLQJq5P9yAzhYspllNJXJEBdJlCko4tXV0P1dlZFdCkgZ1ZCFSL992X cfRU0tGNH10vB1SassJQUDAReIBaHsmW2g+3q26Bi/ZT+nwPkBEvryuHcf+EX/knnx6B rEXcwurgWBEGMpMFXI3RGU6u6+gfBuKoR0ru9r0L4g3k83Al4xUoJ3YMePjs+ZT45O2G Vk6A== X-Gm-Message-State: AOAM532ht3PVBLXKQ+Nk3t1gW7pqB2iw4D9wlPGrC2eGl7B3IMxot+mu i//or+P5LD/35/LaljhUU9I= X-Google-Smtp-Source: ABdhPJyeVYyegMaoemnDktJuPvMIAA8nNsXhR7d0KP0KX9y4TS0Kk1Qh6YBr9tQBppAwiNHh5JRk0w== X-Received: by 2002:a05:600c:a55:: with SMTP id c21mr33724060wmq.191.1638154630689; Sun, 28 Nov 2021 18:57:10 -0800 (PST) Received: from [192.168.123.240] (static.235.156.203.116.clients.your-server.de. [116.203.156.235]) by smtp.gmail.com with ESMTPSA id n2sm18220351wmi.36.2021.11.28.18.57.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 28 Nov 2021 18:57:10 -0800 (PST) Message-ID: Date: Mon, 29 Nov 2021 10:55:58 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:95.0) Gecko/20100101 Thunderbird/95.0 Subject: Re: [PATCH 2/3] mm: page table check Content-Language: en-US To: Pasha Tatashin Cc: LKML , linux-mm , Linux Doc Mailing List , Andrew Morton , David Rientjes , Paul Turner , weixugc@google.com, Greg Thelen , Ingo Molnar , Jonathan Corbet , Will Deacon , Mike Rapoport , Kees Cook , Thomas Gleixner , Peter Zijlstra , masahiroy@kernel.org, Sami Tolvanen , Dave Hansen , "maintainer:X86 ARCHITECTURE" , frederic@kernel.org, "H. Peter Anvin" , "Aneesh Kumar K.V" References: <20211123214814.3756047-1-pasha.tatashin@soleen.com> <20211123214814.3756047-3-pasha.tatashin@soleen.com> <6d82e674-76dc-f3b0-2e53-a92eeb249eff@gmail.com> <7d339956-27fb-4eb6-bd73-791807ddef56@gmail.com> <9e0014e8-e251-360c-ad82-334ad0f28303@gmail.com> From: Fusion Future In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: CC0FC508BB88 X-Stat-Signature: noby49mn7jp6jdwspge19bxn333aqm5g Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=htvwyxeW; spf=pass (imf05.hostedemail.com: domain of qydwhotmail@gmail.com designates 209.85.128.47 as permitted sender) smtp.mailfrom=qydwhotmail@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-HE-Tag: 1638154622-124658 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 2021/11/29 00:57, Pasha Tatashin wrote: > This commit by itself would not cause the freeze or BUG_ON(), but the > next commit which enables it on x86 arch might. Yes, you are right. At the commit "[1e67abff1820489435aad3fcf258708c21c283ef] x86: mm: add x86_64 support for page table check" my system starts to experience the freeze. I can now reproduce the freeze by following the steps below: 1. Open 20 YouTube video pages, and a YouTube Music page. 2. Play music in the background. (The step can be omitted) 3. Run `git clone https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git ln` git will never successfully clone the repo because the system will freeze during the operation. I also tried adding `page_table_check=off` to the boot option but still experienced the freeze. Perhaps the option is of no use.