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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 99510C5DF81 for ; Sun, 23 Aug 2026 19:41:18 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4FB796B0095; Sun, 23 Aug 2026 15:41:17 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4AC926B009B; Sun, 23 Aug 2026 15:41:17 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3C2566B009D; Sun, 23 Aug 2026 15:41:17 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 18F3D6B0095 for ; Sun, 23 Aug 2026 15:41:17 -0400 (EDT) Received: from smtpin15.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 69FCF160394 for ; Sun, 23 Aug 2026 19:41:16 +0000 (UTC) X-FDA: 85133552952.15.5CA1030 Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) by imf26.hostedemail.com (Postfix) with ESMTP id 86531140004 for ; Sun, 23 Aug 2026 19:41:14 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=google.com header.s=20251104 header.b=HaA9HnhP; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf26.hostedemail.com: domain of 32EyLagYKCPkxzjibohpphmf.dpnmjovy-nnlwbdl.psh@flex--wyihan.bounces.google.com designates 209.85.210.197 as permitted sender) smtp.mailfrom=32EyLagYKCPkxzjibohpphmf.dpnmjovy-nnlwbdl.psh@flex--wyihan.bounces.google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1787514074; 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: references:dkim-signature; bh=1YHDRXuyabVdapSHSXZFO8jE+pTDDymBWhtJlJpEAUs=; b=KwE4kQuhZESKnl2+639F9LQLn0A7o7o0u+75M4bmynbIMJEz1DzGEk46XhR1ymidSWL+Wn OCvWjHg0UfGi5YPZvYM7/nfKvcdso6rZVJ+w2KVYHOx4CBxik1B2SSLJduReQy7Aao7QJu 1LZPCQ8+KEPtDgATFoszl635FrROfbc= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=google.com header.s=20251104 header.b=HaA9HnhP; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf26.hostedemail.com: domain of 32EyLagYKCPkxzjibohpphmf.dpnmjovy-nnlwbdl.psh@flex--wyihan.bounces.google.com designates 209.85.210.197 as permitted sender) smtp.mailfrom=32EyLagYKCPkxzjibohpphmf.dpnmjovy-nnlwbdl.psh@flex--wyihan.bounces.google.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1787514074; b=Ruo68cjTkRJ+v+zfhB2ts822aq/iVcWvPyPhdWKY/pVKHNhMypTT+FmNKKF1ljsXCt18NP xAR7HW/O7psHVsoU4MPNv2SmCI+0sxX+fr3GmUWPenIm6g4NalKKxwxDcT/P8bk98QCTfz MOr4bDssyEl1LTTpW1gbgDwldrh6EzM= Received: by mail-pf1-f197.google.com with SMTP id d2e1a72fcca58-84857446424so4797373b3a.1 for ; Sun, 23 Aug 2026 12:41:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1787514073; x=1788118873; darn=kvack.org; h=content-transfer-encoding:content-type:cc:to:from:subject :message-id:mime-version:date:from:to:cc:subject:date:message-id :reply-to:content-type; bh=1YHDRXuyabVdapSHSXZFO8jE+pTDDymBWhtJlJpEAUs=; b=HaA9HnhPwFuG2ZUibs12moWwSbl3YwZ61zPLOrNJBwERzrvH1hPY6vT71N1xU297WA MEgjeBbDhrM1P129h1UcPguXjeD8t1r98pMKLyqhGnfwSrnN1mqffNzi6SntXiRfQFLp hI4VYdqW36D1qnjG8FOxDe2Frbpvwrdd+8qpfRM293/QkgHPf8ASWm2+yphyQOYHPY1J PXuhVNFqNwPXnlxMKNTubbs0bZUi3BqJAsJ+RH31sIYfX1llSs/rC3BAZ3j38XujTUw3 8AC1d2NY/qSU8JesoxHfI+BkuL6Gt4hYuTsZ40pAPTwNo7CRk2pzOMSrImZxCg7w94pi kK3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787514073; x=1788118873; h=content-transfer-encoding:content-type:cc:to:from:subject :message-id:mime-version:date:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to:content-type; bh=1YHDRXuyabVdapSHSXZFO8jE+pTDDymBWhtJlJpEAUs=; b=G3e4udJ5SDMykIMe+1mO02FPb7tkpaW3fIWucZ9dZroD6tXDqcFs+9onHp/rjY8KaM Y1ZGbxR9QnCTfd+5wjkpsWyQGdkPVZ0j0ErPtvmt2U2cyPVnr3YBGxoDF240ykdokdtl 1CgEJMtdoxKjDGjUiwFP6kFTpjeDFSSU+SNsdo7oQJJaaFtxxyISfMVoDFwKgx0nPLz/ aERSPfgh1RzMAHfJecQuJTy1fTqnvPKNcjmtEG9AeOicppV1pqeAE7LxdHi8RuFLC6dn 5ZaBpixulTIa5vnbr8vS800tMFbt3+wKYvwEZAbGoviOLMjCU0teUA12ljyJPElSRcdS Gslg== X-Forwarded-Encrypted: i=1; AHgh+RojR+g7K+7OkjvzZX1R2UMCgDJbyHZKF+QBsQQZaVwZ2b59Kn45wCu3XyaBSmyezJVVthDIYYrWDQ==@kvack.org X-Gm-Message-State: AFuF++klgjTfXbB0BRWhHXzDNSisjHqvliQ+ZPF/P7LhlulUOO1d/V+M H4kScM7NzNl9iUMzCzpYx9WzZVztNeEH9VBzCjafSXD7127RnKlFmKTnttNoKemhkhZ1DSnvLTU nfc+6YA== X-Received: from pfcj21.prod.google.com ([2002:a05:6a00:1755:b0:848:3f4b:c4da]) (user=wyihan job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:997:b0:84a:29a7:f650 with SMTP id d2e1a72fcca58-8520b06403bmr21400701b3a.0.1787514072766; Sun, 23 Aug 2026 12:41:12 -0700 (PDT) Date: Sun, 23 Aug 2026 19:40:53 +0000 Mime-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAMVMi2oC/4WNQQ6CMBBFr0K6dkzTUEBX3sOwmLZTmIRS0yqRE O5uxQO4fC/5728iU2LK4lptItHCmeNcQJ8qYUecBwJ2hYWSqpFatRAoxLSCR55eiSB4cDThSg4 8v6F1GjtfY4edEaXxSFT00b/3hUfOzzI/7pb6a3/lRqo/5aUGCaiNbZ3ReDHqNsQ4THS2MYh+3 /cP6eGeecsAAAA= X-Change-Id: 20260527-memory-failure-mf-delayed-fix-7d5a8f4a8a8b X-Developer-Key: i=wyihan@google.com; a=ed25519; pk=cRi0fKzS5BMxlHyHY2pJv3w/1zcgfYKr6EYGYppdMYc= X-Developer-Signature: v=1; a=ed25519-sha256; t=1787514072; l=1927; i=wyihan@google.com; s=20260319; h=from:subject:message-id; bh=BmydyRyqabJ0xq1KtEZLfqJqBfIHdz1QSKABi+pLLAI=; b=aQ8VY631+PZ+8I90X2r+jykIUJ42Q/O5yclWaB3EPJYnhT9dbJJbqum/jUJQCww5qrZd1UDmT KWwnaZyjzf1Cp4Ox8aHXsiwWhudY/IUqGTsKjYbYdn1AS3GCUvptlH1 X-Mailer: b4 0.14.3 Message-ID: <20260823-memory-failure-mf-delayed-fix-v5-0-d97a5703e45a@google.com> Subject: [PATCH v5 0/5] mm: Fix MF_DELAYED handling on memory failure From: Lisa Wang To: Miaohe Lin , Naoya Horiguchi , Andrew Morton , Paolo Bonzini , Shuah Khan , Hugh Dickins , Baolin Wang , David Hildenbrand , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, Andi Kleen , Hidehiro Kawai , Rik van Riel , Yu Zhang , Lorenzo Stoakes , "Liam R. Howlett" Cc: rientjes@google.com, seanjc@google.com, ackerleytng@google.com, vannapurve@google.com, michael.roth@amd.com, jiaqiyan@google.com, tabba@google.com, dave.hansen@linux.intel.com, Lisa Wang , Isaku Yamahata , Xiaoyao Li Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: fdziyehi1w1631473fq49jxk8j3q9hf3 X-Rspamd-Queue-Id: 86531140004 X-Rspamd-Server: rspam03 X-Rspam-User: X-HE-Tag: 1787514074-233680 X-HE-Meta: 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 uuwRSnX5 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Here's a fifth revision to fix MF_DELAYED handling on memory failure. This patch series addresses an issue in the memory failure handling path where MF_DELAYED is incorrectly treated as an error. This issue was discovered while testing memory failure handling for guest_memfd. The proposed solution involves - 1. Clarifying the definition of MF_DELAYED to mean that memory failure handling is only partially completed, and that the metadata for the memory that failed (as in struct page/folio) is still referenced. 2. Updating shmem=E2=80=99s handling to align with the clarified definition= . 3. Updating how the result of .error_remove_folio() is interpreted. Changes from v4: + Add "fallthrough;" in the memory-failure test, as suggested by David + Add Fixes tags in the commit message, as suggested by Miaohe + Rebase to the branch "mm-stable" + Split the KVM selftests to the future series Thanks for review from Ackerley, Andrew, David and Miaohe! + RFC v4: https://lore.kernel.org/all/20260602-memory-failure-mf-delayed-fi= x-v4-0-a5bc7db5a9b2@google.com/ Signed-off-by: Lisa Wang --- Lisa Wang (5): mm: memory_failure: Clarify the MF_DELAYED definition mm: memory_failure: Allow truncate_error_folio to return MF_DELAYED mm: shmem: Update shmem handler to the MF_DELAYED definition mm: memory_failure: Generalize extra_pins handling to all MF_DELAYED = cases mm: selftests: Add shmem into memory failure test mm/memory-failure.c | 29 ++++--- mm/shmem.c | 2 +- tools/testing/selftests/mm/memory-failure.c | 118 ++++++++++++++++++++++++= +++- 3 files changed, 130 insertions(+), 19 deletions(-) --- base-commit: 08745c62350126bc31b09548137be87e2866f628 change-id: 20260527-memory-failure-mf-delayed-fix-7d5a8f4a8a8b Best regards, --=20 Lisa Wang