From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D13694B7A2E for ; Thu, 17 Sep 2026 23:57:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789689452; cv=none; b=fJKYHmvnXJuaPzglny8k8QNhSM/YTV+RGMH/1iA6ApcxY3kQqeudzPnM802a+a3GwftnY05SXOhbou0Zl2uer3ZV80K3D5MCMG0FHdfdADJhnf1t523CVlsdNLsshtGbNkAZToGvdm73m8uiQwS2azbU0LOpOaxxBRj3/kwOY/8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789689452; c=relaxed/simple; bh=4/XAGS1q/jg5qIgS1SShP/NMMFl32kcmIlaOHzOoExo=; h=Date:To:From:Subject:Message-Id; b=QDRR+2AVlbBGkH092ly83vLiFrzIeM2arn6xXV3UyqLpS1FN3NEiEJ/lpaBfNPXigKsNZ5hSSaMP27vtqEUP80glKQXSNauaURYNjZNPSDNK9vx8fPUT6vUQYBb3f6f7+58i8P6nxhZ7WIcn24ONPR18XB7/oZtOJ7S+5EFo8I8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=uWlxdyRz; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="uWlxdyRz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 454841F000FF; Thu, 17 Sep 2026 23:57:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789689450; bh=IQ1FloTO2PyK6gSL/8eDy2qa7votLx4WF8e2Gfcwix4=; h=Date:To:From:Subject; b=uWlxdyRzN6khYBrjfL1579Rb9TJXGZNO0IIhKjX8Shna/tiDdce94hqhEfyJdLTiD UBRxPx6ILPAet6YTA83oby7LlpwYEUuymnkSJ4lgxMNqXhxd1mT7anj7Bl2WGw/DHP gALrD+40b+UnNLCF6Dwuf3Jmupxh9JlccVnPvZ7A= Date: Thu, 17 Sep 2026 16:57:29 -0700 To: mm-commits@vger.kernel.org,wyihan@google.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-memory_failure-generalize-extra_pins-handling-to-all-mf_delayed-cases.patch added to mm-new branch Message-Id: <20260917235730.454841F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm: memory_failure: Generalize extra_pins handling to all MF_DELAYED cases has been added to the -mm mm-new branch. Its filename is mm-memory_failure-generalize-extra_pins-handling-to-all-mf_delayed-cases.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory_failure-generalize-extra_pins-handling-to-all-mf_delayed-cases.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Lisa Wang Subject: mm: memory_failure: Generalize extra_pins handling to all MF_DELAYED cases Date: Thu, 17 Sep 2026 20:43:50 +0000 Generalize extra_pins handling to all MF_DELAYED cases not only shmem_mapping. If MF_DELAYED is returned, the filemap continues to hold refcounts on the folio. Hence, take that into account when checking for extra refcounts. As clarified in an earlier patch, a return value of MF_DELAYED implies that the page still has elevated refcounts. Hence, set extra_pins to true if the return value is MF_DELAYED. This is aligned with the implementation in me_swapcache_dirty(), where, if a folio is still in the swap cache, ret is set to MF_DELAYED and extra_pins is set to true. Link: https://lore.kernel.org/20260917-memory-failure-mf-delayed-fix-v6-4-4b00856b5364@google.com Signed-off-by: Lisa Wang Signed-off-by: Andrew Morton Acked-by: David Hildenbrand (Arm) Acked-by: Miaohe Lin Reviewed-by: Ackerley Tng Cc: Andi Kleen Cc: Baolin Wang Cc: Dave Hansen Cc: David Rientjes Cc: Fuad Tabba Cc: Hidehiro Kawai Cc: Hugh Dickins Cc: Isaku Yamahata Cc: Jiaqi Yan Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michael Roth Cc: Michal Hocko Cc: Mike Rapoport Cc: Naoya Horiguchi Cc: Paolo Bonzini Cc: Rik van Riel Cc: Sean Christopherson Cc: Shuah Khan Cc: Suren Baghdasaryan Cc: Vishal Annapurve Cc: Vlastimil Babka Cc: Xiaoyao Li Cc: Yu Zhang --- mm/memory-failure.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) --- a/mm/memory-failure.c~mm-memory_failure-generalize-extra_pins-handling-to-all-mf_delayed-cases +++ a/mm/memory-failure.c @@ -1040,17 +1040,13 @@ static int me_pagecache_clean(struct pag } /* - * The shmem page is kept in page cache instead of truncating - * so is expected to have an extra refcount after error-handling. - */ - extra_pins = shmem_mapping(mapping); - - /* * Truncation is a bit tricky. Enable it per file system for now. * * Open: to take i_rwsem or not for this? Right now we don't. */ ret = truncate_error_folio(folio, page_to_pfn(p), mapping); + + extra_pins = ret == MF_DELAYED; if (has_extra_refcount(ps, p, extra_pins)) ret = MF_FAILED; _ Patches currently in -mm which might be from wyihan@google.com are mm-memory_failure-clarify-the-mf_delayed-definition.patch mm-memory_failure-allow-truncate_error_folio-to-return-mf_delayed.patch mm-shmem-update-shmem-handler-to-the-mf_delayed-definition.patch mm-memory_failure-generalize-extra_pins-handling-to-all-mf_delayed-cases.patch mm-selftests-add-shmem-into-memory-failure-test.patch