From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 77F11302CD5 for ; Mon, 18 May 2026 21:59:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779141564; cv=none; b=UIL9cYpKxGRPKXG9owPLXoFE3CGOu5CxzfOlxeiEU/jqy59kvjvJ6t676xWFwPmiCuygR4vqDpQzmrBW+IVg3iI5Ioc1q+JFqgPKb8OrJto+upEGC0BwP40lesLPTprITvfI9HTNeB8dgitobu9H3KNgyXHpy3k2qdaY/N905n4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779141564; c=relaxed/simple; bh=ok/CGP9YWih7bTnb9nINu60eOuacsqbcE/LvAjHnMhI=; h=Date:To:From:Subject:Message-Id; b=nr1iVxTc6C9KOBvNlA6A5kjKc9hC4gnhqWAiM8BhVgbbOyzmFxT/tWgt194vWDE+CAZ6ozmb3l9HwGmA7b94CnMoagFzo+kSt97GMAjyQcDNulDcC3ScMYNGQp0K53dx0bUBv/D8o+FYnpJX4j+VtiHJrDphJCm3HIq8dCtRW+I= 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=CmXhd0mO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="CmXhd0mO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1AFCEC2BCB7; Mon, 18 May 2026 21:59:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1779141564; bh=ok/CGP9YWih7bTnb9nINu60eOuacsqbcE/LvAjHnMhI=; h=Date:To:From:Subject:From; b=CmXhd0mOUORO/2J34ToSyAh2Uojb35BzhRxLxH391mLKwqHMbUnm9ut3iVn4qNaad MWrLA2AjoaXWCP5tmPYt+BMTVixPcW11O2MU2V7TShrmjv8SF+M5shBNGbJ7BneG/s W8qoLctiHnkSdg7Rx2YroDlo17Ol/SXp8WY0b7p8= Date: Mon, 18 May 2026 14:59:23 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-huge_memory-remove-read_only_thp_for_fs-from-file_thp_enabled.patch removed from -mm tree Message-Id: <20260518215924.1AFCEC2BCB7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/huge_memory: remove READ_ONLY_THP_FOR_FS from file_thp_enabled() has been removed from the -mm tree. Its filename was mm-huge_memory-remove-read_only_thp_for_fs-from-file_thp_enabled.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Zi Yan Subject: mm/huge_memory: remove READ_ONLY_THP_FOR_FS from file_thp_enabled() Date: Wed, 29 Apr 2026 11:29:13 -0400 Replace it with a check on the max folio order of the file's address space mapping, making sure PMD folio is supported. Keep the inode open-for-write check, since even if collapse_file() now makes sure all to-be-collapsed folios are clean and the created PMD file THP can be handled by FSes properly, the filemap_flush() could perform undesirable write back. Link: https://lore.kernel.org/20260429152924.727124-4-ziy@nvidia.com Signed-off-by: Zi Yan Acked-by: David Hildenbrand (Arm) Reviewed-by: Lance Yang Reviewed-by: Nico Pache Cc: Al Viro Cc: Baolin Wang Cc: Barry Song Cc: Chris Mason Cc: Christian Brauner Cc: David Sterba Cc: Dev Jain Cc: Jan Kara Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Ryan Roberts Cc: Shuah Khan Cc: Song Liu Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- mm/huge_memory.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/mm/huge_memory.c~mm-huge_memory-remove-read_only_thp_for_fs-from-file_thp_enabled +++ a/mm/huge_memory.c @@ -86,9 +86,6 @@ static inline bool file_thp_enabled(stru { struct inode *inode; - if (!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS)) - return false; - if (!vma->vm_file) return false; @@ -97,6 +94,9 @@ static inline bool file_thp_enabled(stru if (IS_ANON_FILE(inode)) return false; + if (!mapping_pmd_folio_support(vma->vm_file->f_mapping)) + return false; + return !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode); } _ Patches currently in -mm which might be from ziy@nvidia.com are mm-khugepaged-remove-read_only_thp_for_fs-check-in-hugepage_enabled.patch mm-remove-read_only_thp_for_fs-kconfig-option.patch mm-fs-remove-filemap_nr_thps-functions-and-their-users.patch fs-remove-nr_thps-from-struct-address_space.patch mm-huge_memory-remove-folio-split-check-for-read_only_thp_for_fs.patch mm-truncate-use-folio_split-in-truncate_inode_partial_folio.patch fs-btrfs-remove-a-comment-referring-to-read_only_thp_for_fs.patch selftests-mm-remove-read_only_thp_for_fs-in-khugepaged.patch selftests-mm-remove-read_only_thp_for_fs-in-khugepaged-fix.patch selftests-mm-remove-read_only_thp_for_fs-in-khugepaged-fix-2.patch selftests-mm-remove-read_only_thp_for_fs-code-from-guard-regions.patch mm-khugepaged-enable-clean-pagecache-folio-collapse-for-writable-files.patch selftests-mm-add-writable-file-collapse-tests-for-khugepaged.patch