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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8626FC43219 for ; Thu, 10 Nov 2022 21:28:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231920AbiKJV2j (ORCPT ); Thu, 10 Nov 2022 16:28:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231777AbiKJV2f (ORCPT ); Thu, 10 Nov 2022 16:28:35 -0500 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1B8F10B59; Thu, 10 Nov 2022 13:28:33 -0800 (PST) Received: by mail-pj1-x1035.google.com with SMTP id q1-20020a17090a750100b002139ec1e999so3023233pjk.1; Thu, 10 Nov 2022 13:28:33 -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=FdweV6Eqacl45N4CFxU7Hxugn551xI3ja0/oz/ZpvmaIumU7Dyrt3UqIU+dj8cfygg jhHFWLhDXfNpnoV98p2DybvB3Y9Ul084G81ReaQ2nsCZyEYlUNm84ix12kSH8BqZbKDP 66bJMHTW1bhkz81HTOkbxU8ppqQAbhT2LihmrQG31bUSB3Izxp2xDJXiESqGRuKQcnJm 0gPDhRjFkO4NELv10TPtue7cTBt3mAnxYHckFsqSATTDUE0QMTgK9eyaJNCSvlQxA1xG FA2+SlR390GWjAMDcWH4rrLreXN2/zJ77aXnvVWgquPv6MeEbDky87ZOOzNRtgeWtuaJ ZvIA== X-Gm-Message-State: ACrzQf3nnSHW8ocDh+spVADuxi2RgK8J9PzsrBf288lwW7ziokGZKm/W 9I2s3dyFojw+fJjXJXqpvdg= 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) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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