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 ADEDDC4332F for ; Thu, 10 Nov 2022 21:28:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2ED218E0001; Thu, 10 Nov 2022 16:28:38 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 276486B0078; Thu, 10 Nov 2022 16:28:38 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 117338E0001; Thu, 10 Nov 2022 16:28:38 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id F38506B0075 for ; Thu, 10 Nov 2022 16:28:37 -0500 (EST) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 9D639ABC09 for ; Thu, 10 Nov 2022 21:28:37 +0000 (UTC) X-FDA: 80118821874.27.2494D2E Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) by imf01.hostedemail.com (Postfix) with ESMTP id 7328540006 for ; Thu, 10 Nov 2022 21:28:34 +0000 (UTC) Received: by mail-pj1-f49.google.com with SMTP id k5so2788177pjo.5 for ; Thu, 10 Nov 2022 13:28:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=80I3arJoq2GrS2cZeP4yUcWNDKrQfchQjs2gAQ+Po1Q=; b=kkwpINsNl2KamFdaIA8i5cwK+MyS/iW/atr4aE6Lt1JEM9hUlrN+crn+2jRCqkRWG6 MZdN2JLklsJbjDokxP000kp7jZD2YYo1qNImhAvicIvi2aZCqwQV2MiWGv1LlDTcyUSO lUf/e4R498GCBixdP1qz3j/GJwT9PpFW1OyGKsqPzLfR9ir0+hqo3nICS8CZD7QjAAx+ 6HwXWnBeowR41Un3FlbHoRkLAy1ieMe2gIGHq7J+9H4APhbDvDQoixPCimx7lw0eWljk 5usUz7URWDFUojHM7WQIc2Vm+1gwm2VuZVzE+dJLlbxAHpXnDYMgWvDy+p/SZOnP/U6z /ZFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=80I3arJoq2GrS2cZeP4yUcWNDKrQfchQjs2gAQ+Po1Q=; b=DyjohFUKwglWcw4eRJFzzGd+anoxrNOzdmoHMUkSkzeotbysJZYIUOhxlfZz5viZBi 4qdutOh73+F9Ktk0UQgNzeznRHzhlpN8OMg+bTuMy2N89u74Jnk4vuXSjpwfZMh63CDV 46CALXtMs3N1nn8ZjF+4720N6DltYplaadgVEdJIAPhYesNXs7/QExYaA44tESAE7Vwv N2fUph6CaCkT9RtyxhXa0R1692KWLSdXYbQXdDOHvb/VwJLF0/JiFlC6XH+wQJic9Tr+ 79wpdzn2V+o6Kyor/Pk3dUlWLrEIq+SluDF4GimVejy4qrfPuWIGh3W+kt5w7tPMj5O9 5OrA== X-Gm-Message-State: ACrzQf3r9kTtWITx2NP5Ih4lZ70Vzu/PkIc4FQQkoUM467iivdEllI2V TCwXsETRBhVmWg1zYedoen4= X-Google-Smtp-Source: AMsMyM6AHXBx6OBeNoBiyE1b8AO/7FnghYsNzO2ZZKvU3O+Mdgo0L+OPUSN49TsnmMLfbSdK53UB5w== X-Received: by 2002:a17:902:b10a:b0:180:be71:6773 with SMTP id q10-20020a170902b10a00b00180be716773mr2165321plr.42.1668115713084; Thu, 10 Nov 2022 13:28:33 -0800 (PST) Received: from smtpclient.apple ([66.170.99.95]) by smtp.gmail.com with ESMTPSA id w184-20020a6262c1000000b0056babe4fb8asm118031pfb.49.2022.11.10.13.28.31 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 10 Nov 2022 13:28:32 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.1\)) Subject: Re: [PATCH v2 1/2] mm/migrate: Fix read-only page got writable when recover pte From: Nadav Amit In-Reply-To: <20221110203132.1498183-2-peterx@redhat.com> Date: Thu, 10 Nov 2022 13:28:31 -0800 Cc: kernel list , Linux-MM , Andrea Arcangeli , Axel Rasmussen , Ives van Hoorne , Andrew Morton , Mike Rapoport , stable@vger.kernel.org Content-Transfer-Encoding: 7bit Message-Id: <65FA2E7E-1F12-4919-BD79-11159934CF2C@gmail.com> References: <20221110203132.1498183-1-peterx@redhat.com> <20221110203132.1498183-2-peterx@redhat.com> To: Peter Xu X-Mailer: Apple Mail (2.3696.120.41.1.1) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1668115714; a=rsa-sha256; cv=none; b=P3THO7LmYDfxsYO2QdTYufZc+UNHUoMarM8qb9Dgz+C+OAwCOBoZx5zuDMv9IpG406tgMk YgVG77EQffBAeFP5uHxQfJUxL6I9DjGPNdOLmPvhr6NfWVACWzvcpeeBRYpf+tnq4b1vrH ZW1BR0Osy7Oqa5XXT2jVAxT7zQqsYqk= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=kkwpINsN; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf01.hostedemail.com: domain of nadav.amit@gmail.com designates 209.85.216.49 as permitted sender) smtp.mailfrom=nadav.amit@gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1668115714; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=80I3arJoq2GrS2cZeP4yUcWNDKrQfchQjs2gAQ+Po1Q=; b=ll763IV7KRj2mxzEnz5LmlcyOLYio+FkiF3So2ztlZZk9L4iww5agIfvnlmpgr3RMHwYbG UQnbk/M2/7vXLLYGkciUgvQlpAa0qozkNJ/ws8cTaKXirpNFW6WGiLekf4EKEVKAioWMvQ 0Hx9NLydUy5YHFdULbMhYzMfCj35eNE= X-Rspam-User: X-Stat-Signature: ubh86ony68ppgxkhfm1aeupuje4m7icu X-Rspamd-Queue-Id: 7328540006 Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=kkwpINsN; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf01.hostedemail.com: domain of nadav.amit@gmail.com designates 209.85.216.49 as permitted sender) smtp.mailfrom=nadav.amit@gmail.com X-Rspamd-Server: rspam03 X-HE-Tag: 1668115714-816603 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Nov 10, 2022, at 12:31 PM, Peter Xu wrote: > Ives van Hoorne from codesandbox.io reported an issue regarding possible > data loss of uffd-wp when applied to memfds on heavily loaded systems. The > sympton is some read page got data mismatch from the snapshot child VMs. symptom (if you care) Other than that LGTM