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 4AED4C04E69 for ; Wed, 2 Aug 2023 11:47:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A56C428015F; Wed, 2 Aug 2023 07:47:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A0672280143; Wed, 2 Aug 2023 07:47:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8F4E128015F; Wed, 2 Aug 2023 07:47:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 80C2C280143 for ; Wed, 2 Aug 2023 07:47:19 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 0D3BB1C9E5A for ; Wed, 2 Aug 2023 11:47:19 +0000 (UTC) X-FDA: 81078988998.08.4CC0545 Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) by imf23.hostedemail.com (Postfix) with ESMTP id 02792140015 for ; Wed, 2 Aug 2023 11:47:15 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=gmail.com header.s=20221208 header.b=Vny3mbDM; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf23.hostedemail.com: domain of bagasdotme@gmail.com designates 209.85.210.174 as permitted sender) smtp.mailfrom=bagasdotme@gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1690976836; a=rsa-sha256; cv=none; b=gV4pDHGtT1oHTRh+V3qdTpxwqYB+b1qnug7t5+6Z0c5dbUZaoLZcE5pnqcc0MyfgWoxbsf hnDFVH/PE62g1espxnOncQzp36lN6epmfoumGwoo8//8i5fX1gbgj8AcJjAOG3eTQLiqWW 7l6M/dv6AfxI5OYmLTkLibm9ktADtCc= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=gmail.com header.s=20221208 header.b=Vny3mbDM; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf23.hostedemail.com: domain of bagasdotme@gmail.com designates 209.85.210.174 as permitted sender) smtp.mailfrom=bagasdotme@gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1690976836; 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=VY3CwLeeFL+w/eySez9e+xGTeCEfKyGFVnZ00Q7RfZU=; b=Mh+guolBjSUsqzSZ5ofddDWPoT1nIXTLarB60LJySDv/Sc2FqfMcHEuq7CT7TQkVbmqeA5 hE7aVjfvlvT1Po2M168FtIUY1lbtgnOjWaiOVN5asa15dWjYTIuaiR6Iv58fTZiMdG4WAd Bn5kJvnpxBxLhk2xv79R4ZXWzB5AZXA= Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-686efdeabaeso4521915b3a.3 for ; Wed, 02 Aug 2023 04:47:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690976835; x=1691581635; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=VY3CwLeeFL+w/eySez9e+xGTeCEfKyGFVnZ00Q7RfZU=; b=Vny3mbDMw7q/ssnfYjctbBd3CIipCZXnNYA5QTgweLyYzansSIxAV9ED1EUSBco30D v7RauWrVghF1PXGTJtkJ7zrSnGgWySj8r1qtXClJqPy53px7Ay50GV+oMZQ9YT8BoMXB CCczaVHXtb87XnCnUKTk15pQ0M6/2aw7k5X7WENbUebJw+JLzGSUtPa0i9U36UtlvyKg VSY0EoW/awqblJJbifNw0eHHlSXzP6rhpCPRtz2MfySGM1MabFOEr7IcPqByYH5qRgmE 16u1a7+oIvscHnjJgFUFWvGl2RQLkxr4kerfLii3Y4P6h9ZnzQF1oedU43+Xi4+OOsgK NafQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690976835; x=1691581635; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=VY3CwLeeFL+w/eySez9e+xGTeCEfKyGFVnZ00Q7RfZU=; b=TOz7bnhQls3daeEq4x9KgpBrsVRueG1ZNfTjoCjYwIrazCq+XjB9AfZ5gH7z2TaXBP IoU/kEE/yU/OQugp4A2aL5KC3cb6NIZNsmy+0iP+vT65Bra4zWAbQDbdpqXtnYGuk9YL 9c+yPbaT/BOs9Cg7EqUqR0xeepXDhJefOkFLuM3m37v6eax381pH1BnDH6M96ReySEqs OFlhbfqhzeAHVaMSed3vdTuloIT46aM1Tm4VjMo4r/j5Fz1yXUafNzUe9/F//Ie46b8k QvjKxAi1TzHfZYylBWQNfknz+KseBFhKCvzGGUGKp2RznQ9aDyI+l3tPRPi32dWbuiUQ vnHQ== X-Gm-Message-State: ABy/qLZOKliQGczut3XJfxBjCQQmn96Kv9OOICgE+GsR9ujZp9uWt8BQ LCpfG3mKn/bNNxyKN6l4CNs= X-Google-Smtp-Source: APBJJlEpUfLURkH4ozeq4gDIqhcXfZws4XX4fNnlLu6cBXCAquozJUcCFvAbdc02zQ9k9ve7oerakA== X-Received: by 2002:a05:6a00:390f:b0:682:4de1:adcc with SMTP id fh15-20020a056a00390f00b006824de1adccmr16139531pfb.12.1690976834708; Wed, 02 Aug 2023 04:47:14 -0700 (PDT) Received: from [192.168.0.105] ([103.131.18.64]) by smtp.gmail.com with ESMTPSA id c20-20020aa78c14000000b006871fdde2c7sm7127677pfd.110.2023.08.02.04.47.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Aug 2023 04:47:14 -0700 (PDT) Message-ID: <307e4377-f52f-40dc-23ec-90a75668cb99@gmail.com> Date: Wed, 2 Aug 2023 18:47:07 +0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: Fwd: Kernel memory management bug at mm/migrate.c:662 when flushing caches Content-Language: en-US To: Linux regressions mailing list , Alistair Popple , Felix Kuehling , Andrew Morton , Marco Cc: Linux Kernel Mailing List , Linux Memory Management List References: <428d8fe9-8c19-ddba-b36e-7db5524e8d04@gmail.com> <32c3d93c-c320-0f88-87db-003f51bfc039@leemhuis.info> From: Bagas Sanjaya In-Reply-To: <32c3d93c-c320-0f88-87db-003f51bfc039@leemhuis.info> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 02792140015 X-Stat-Signature: 6dgc1d71h1fw4w3nrhrrddnbbbfdhmbm X-HE-Tag: 1690976835-963509 X-HE-Meta: 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 bk1Dox0t mPWm74GSDnB8I5R7bHO164n6Vr9mjlxvUomGjZIFPUbZV8mS8H1bQrCXfB+F8lNVdT1z5fLsfyatpyw3MU91/tTShAawuw8dZkn6aAFY/68ZYRTRSqJLScRgRuO9ycgyTjapDiTLVZxaRtCYW3c5/hYTrwim5uXuNDZcj8wjIGkDAGvObX6gKBlkE5k8L+VUS7NXBlEjXcp/haW+Ub8UtNNzPZW9ldZfP9PDYcxVUJR+IyyRcw0RJnwVUxLKpAEbcdWXlcI8WM3eBxLbpQoSliGKyY8NCbLgfdrRn4ZHAD3epamSEGJtxqnCIOm/Xmycta0JmL2D8UEE2HGu0H0R/rHnXG+j5arFqo3mJXlynTAtJEENNH54PHrFNvLmITg6Y4S668qu/lSPO902frN8o0P7GhF0MIbK2r6Ewm9InlSpT+J6vtAO31wIMdg== 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 02/08/2023 18:25, Linux regression tracking (Thorsten Leemhuis) wrote: > On 02.08.23 13:08, Bagas Sanjaya wrote: >> >> I notice a regression report on Bugzilla [1]. Quoting from it: >> >>> I hit this kernel bug on the latest 6.3.9 kernel after executing this script to cleanup hugepages from the kernel before booting up a Windows 11 VM with QEMU (otherwise I don't have enough contiguous memory to allocate the pages to the VM) >>> >>> snip >>> if [[ $VM_ACTION == 'prepare' ]]; >>> then >>> sync >>> echo 3 > /proc/sys/vm/drop_caches >>> echo 1 > /proc/sys/vm/compact_memory >>> endsnip >>> >>> Attached is the full QEMU script that I used. I do use ZFS as a root filesystem, as you can see from the loaded modules. > > Bagas, FWIW, I'd totally understand if developers will ignore this > (remains to be seen if that is the case, maybe we are lucky and somebody > will take a look), as I think you for now shouldn't have forwarded this > for two reasons: > > * 6.3.y is old and EOL; testing mainline or at least a fresh 6.4.y > kernel) would have been a must here. > * with out-of-tree modules like ZFS anything can happen, the user is own > its own. > I have already asked the reporter to try reproducing this with "officially-supported" other filesystems (e.g. ext4, xfs, or btrfs). The reporter also stated that he was now trying the mainline (but not rc release, just latest stable). > As I can see from the bug both things will likely clear up soon, hence > waiting would have been wise here. > > Please in the future do not forward such bugs, as developers might > otherwise start to ignore mails wrt to regression tracking -- which we > really need to avoid, as that will make things a lot harder. > Thanks for another tip! -- An old man doll... just what I always wanted! - Clara