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 76085371045 for ; Fri, 24 Apr 2026 10:31:23 +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=1777026683; cv=none; b=soUewOMWVwp7W0U+aecpHhu3wRq6RXHeyi/Pgwc8W0wYcnFOJ6RraEFExo4o41kNswz8/4bvn+o1iHLw39+f8EpTrZTdmaR717IbZ4EqZyMKUrqkYjAC9mmo0l+vi/i1E2+kB9dRsTMzxy2Ymupxok2qpeROc3FjHLdQPWD15dE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777026683; c=relaxed/simple; bh=UcbESoqi8Vx8lkWNjsD2iIURXr7bGqYASGTli7B4HYM=; h=Date:To:From:Subject:Message-Id; b=T3n8c6SoW2rnnBX3hDSV/3c8bq3qnpNhXmigorRGz350Gw6NkNI0g0rX/0dv0VoUThwiBwoo6+1Zt9frkcPKVVu/vUy+q7xzKhUtM7OpeAe+LRxIkrY+mPOZgO5yHDORrOCEeYNXeo3RloS37H/sFt/2/fq0GF5rkPaidAsZESc= 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=yTYea3Rg; 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="yTYea3Rg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0CBB0C4AF09; Fri, 24 Apr 2026 10:31:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1777026683; bh=UcbESoqi8Vx8lkWNjsD2iIURXr7bGqYASGTli7B4HYM=; h=Date:To:From:Subject:From; b=yTYea3RgveDycPZzQ1FzUeauC9Vab/RkMO04OYlcd2WagE2pVqSUGZGwh4O3aYe8z gyE9CpFrNXQt/BCTKkXH9WzItPp3HmtbNZeR8ZPoYenUd5SeJxHuwI0arFj+vbLFgV tG4iimFPEWLs89jCZ8nTs0G8zjQQno2oy9xa+7GU= Date: Fri, 24 Apr 2026 03:31:22 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,akpm@linux-foundation.org From: Andrew Morton Subject: + selftests-mm-remove-read_only_thp_for_fs-code-from-guard-regions.patch added to mm-new branch Message-Id: <20260424103123.0CBB0C4AF09@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: selftests/mm: remove READ_ONLY_THP_FOR_FS code from guard-regions has been added to the -mm mm-new branch. Its filename is selftests-mm-remove-read_only_thp_for_fs-code-from-guard-regions.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-remove-read_only_thp_for_fs-code-from-guard-regions.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: Zi Yan Subject: selftests/mm: remove READ_ONLY_THP_FOR_FS code from guard-regions Date: Thu, 23 Apr 2026 22:49:15 -0400 Any file system with large folio support and the supported orders include PMD_ORDER can be used. There is no need to open a file with read-only. Link: https://lore.kernel.org/20260424024915.28758-13-ziy@nvidia.com Signed-off-by: Zi Yan Cc: Al Viro Cc: Baolin Wang Cc: Barry Song Cc: Chris Mason Cc: Christian Brauner Cc: David Hildenbrand (Arm) Cc: David Sterba Cc: Dev Jain Cc: Jan Kara Cc: Lance Yang Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Nico Pache Cc: Ryan Roberts Cc: Shuah Khan Cc: Song Liu Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton --- tools/testing/selftests/mm/guard-regions.c | 18 ++++-------------- 1 file changed, 4 insertions(+), 14 deletions(-) --- a/tools/testing/selftests/mm/guard-regions.c~selftests-mm-remove-read_only_thp_for_fs-code-from-guard-regions +++ a/tools/testing/selftests/mm/guard-regions.c @@ -2203,17 +2203,6 @@ TEST_F(guard_regions, collapse) if (variant->backing != ANON_BACKED) ASSERT_EQ(ftruncate(self->fd, size), 0); - /* - * We must close and re-open local-file backed as read-only for - * CONFIG_READ_ONLY_THP_FOR_FS to work. - */ - if (variant->backing == LOCAL_FILE_BACKED) { - ASSERT_EQ(close(self->fd), 0); - - self->fd = open(self->path, O_RDONLY); - ASSERT_GE(self->fd, 0); - } - ptr = mmap_(self, variant, NULL, size, PROT_READ, 0, 0); ASSERT_NE(ptr, MAP_FAILED); @@ -2237,9 +2226,10 @@ TEST_F(guard_regions, collapse) /* * Now collapse the entire region. This should fail in all cases. * - * The madvise() call will also fail if CONFIG_READ_ONLY_THP_FOR_FS is - * not set for the local file case, but we can't differentiate whether - * this occurred or if the collapse was rightly rejected. + * The madvise() call will also fail if the file system does not support + * large folio or the supported orders do not include PMD_ORDER for the + * local file case, but we can't differentiate whether this occurred or + * if the collapse was rightly rejected. */ EXPECT_NE(madvise(ptr, size, MADV_COLLAPSE), 0); _ Patches currently in -mm which might be from ziy@nvidia.com are mm-khugepaged-remove-read_only_thp_for_fs-check.patch mm-khugepaged-add-folio-dirty-check-after-try_to_unmap.patch mm-huge_memory-remove-read_only_thp_for_fs-from-file_thp_enabled.patch 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-code-from-guard-regions.patch