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 335CB547048 for ; Fri, 2 Oct 2026 00:33:25 +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=1790901207; cv=none; b=LfoKREXNdlesQ6aBUA0GET8ffyYRle6OK3dZn7TrdNjrIne64c+/Zr/C5AopcfB3aa8JtGjLtgqbo0roo3jR20D1h5fvHNSmKdi25P8JBwlYKAezyGtAmZ6BRISRvpc+3wM/tGOCpa6Fsl9rRpkzbtsg+cad5FrrPvRj8pvU2D0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790901207; c=relaxed/simple; bh=dPuG/jT9uYxOcBYAK9XBjkTHJO/a4nTF+3GvAijDx0w=; h=Date:To:From:Subject:Message-Id; b=OWNbqcrFUkrQ89pD+E/hDWNvwb2sfRxbQ/f5a+FezS0thEtiPptUCwf9OTvcU93bzJGppNT48/MYZ3p7l1g11MDJqxRje2tGaPDAC7lEwTMotBVDQtQkWqERZEELgq/wN2D9sJOF8xrAIwPLcyRZ9E1YKi/fGKZUr3nLThiAHIs= 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=a1IyNnWo; 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="a1IyNnWo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AD3A01F000FF; Fri, 2 Oct 2026 00:33:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1790901205; bh=9xi/ogP7fjJMOJ4tfehdf/uU3vyuH0kffoKPYUQAvxw=; h=Date:To:From:Subject; b=a1IyNnWoI1QmF3gOGcYIZ7pUMTh85ILWCY8TSlByV6Y/aRnuV36bqNI4Gbe4b0MXx pirXcKrSEJA0MNV+6xqrkao5qDDg5iBGsKzdu57Y863QcHuaF/JUdcuXqWWn95s9Cu uBuqm6zZQRC4hUBp7ZTcgi2n+qKrjee2zk0174lo= Date: Thu, 01 Oct 2026 17:33:25 -0700 To: mm-commits@vger.kernel.org,yeoreum.yun@arm.com,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] kselftest-mm-integrate-huge-page-checks.patch removed from -mm tree Message-Id: <20261002003325.AD3A01F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: kselftest: mm: integrate huge page checks has been removed from the -mm tree. Its filename was kselftest-mm-integrate-huge-page-checks.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Yeoreum Yun Subject: kselftest: mm: integrate huge page checks Date: Thu, 24 Sep 2026 20:11:18 +0100 check_large_folios() only checks for large folios without distinguishing between anonymous and file-backed huge pages. To add huge page type checking, integrate the huge page checks into __check_huge(): 1. If hpage_size == pmd_pagesize, check PAGE_IS_HUGE instead of using check_large_folios(), since only the mapping type matters. This identifies PMD-mapped huge pages. 2. Otherwise, use check_large_folios() to detect large folios. This covers mTHP cases. 3. Check the folio flags according to the huge page type. Link: https://lore.kernel.org/20260924-fix_split-v8-3-cba7359d882a@arm.com Signed-off-by: Yeoreum Yun Signed-off-by: Andrew Morton Suggested-by: David Hildenbrand (Arm) Suggested-by: Zi Yan Reviewed-by: Sarthak Sharma Reviewed-by: Baolin Wang Tested-by: Baolin Wang Cc: Lorenzo Stoakes Cc: Liam R. Howlett Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Lance Yang Cc: Usama Arif Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Shuah Khan Cc: Kevin Brodsky --- tools/testing/selftests/mm/vm_util.c | 90 +++++++++++++------------ 1 file changed, 48 insertions(+), 42 deletions(-) --- a/tools/testing/selftests/mm/vm_util.c~kselftest-mm-integrate-huge-page-checks +++ a/tools/testing/selftests/mm/vm_util.c @@ -351,13 +351,13 @@ err_out: return entry; } -static bool check_large_folios(void *addr, size_t len, int nr_hpages, +static bool check_large_folios(int pagemap_fd, int kpageflags_fd, + void *addr, size_t len, int nr_hpages, uint64_t hpage_size) { int order = 0, pagesize = getpagesize(); unsigned int nr_pages = hpage_size / pagesize; int orders[MAX_NR_ORDERS], status; - int pagemap_fd, kpageflags_fd; bool ret = false; if (!nr_pages) @@ -368,15 +368,6 @@ static bool check_large_folios(void *add ksft_exit_fail_msg("invalid order\n"); memset(orders, 0, sizeof(int) * MAX_NR_ORDERS); - pagemap_fd = open(PAGEMAP_PATH, O_RDONLY); - if (pagemap_fd == -1) - ksft_exit_fail_msg("read pagemap fail\n"); - - kpageflags_fd = open(KPAGEFLAGS_PATH, O_RDONLY); - if (kpageflags_fd == -1) { - close(pagemap_fd); - ksft_exit_fail_msg("read kpageflags fail\n"); - } status = gather_folio_orders(addr, len, pagemap_fd, kpageflags_fd, orders, MAX_NR_ORDERS); @@ -387,8 +378,6 @@ static bool check_large_folios(void *add ret = true; out: - close(pagemap_fd); - close(kpageflags_fd); return ret; } @@ -411,57 +400,74 @@ static bool check_huge_type(uint64_t cat return false; } -static bool __check_pmd_huge(void *addr, size_t len, int nr_hpages, - uint64_t hpage_size, enum check_huge_type type) +static bool __check_huge(void *addr, size_t len, int nr_hpages, + uint64_t hpage_size, enum check_huge_type type) { - int pagemap_fd; + bool ret = false; + int pagemap_fd, kpageflags_fd; int nr_pmd_mappings = 0; + uint64_t pmd_pagesize, scan_mapping_size; uint64_t categories; + unsigned long pfn; + bool check_pmd_mapping, allow_nonpresent; char *start = addr; char *end = start + len; + pmd_pagesize = read_pmd_pagesize(); + if (!pmd_pagesize) + ksft_exit_fail_msg("reading PMD pagesize failed\n"); + + check_pmd_mapping = hpage_size == pmd_pagesize; + scan_mapping_size = (nr_hpages > 0) ? hpage_size : psize(); + /* Some mTHP tests check a partially populated PMD-sized range. */ + allow_nonpresent = (uint64_t)nr_hpages * hpage_size < len; + pagemap_fd = open(PAGEMAP_PATH, O_RDONLY); if (pagemap_fd < 0) ksft_exit_fail_msg("open pagemap fail\n"); - for (; start < end; start += hpage_size) { + kpageflags_fd = open(KPAGEFLAGS_PATH, O_RDONLY); + if (kpageflags_fd < 0) + ksft_exit_fail_msg("open kpageflags fail\n"); + + if (!check_pmd_mapping && + !check_large_folios(pagemap_fd, kpageflags_fd, + addr, len, nr_hpages, hpage_size)) + goto out; + + for (; start < end; start += scan_mapping_size) { categories = pagemap_scan_get_categories(pagemap_fd, start); - if (!(categories & PAGE_IS_HUGE)) - continue; - if (check_huge_type(categories, type)) + pfn = pagemap_get_pfn(pagemap_fd, start); + if (pfn == -1UL) { + if (!allow_nonpresent) + goto out; + else + continue; + } + if (check_pmd_mapping && (categories & PAGE_IS_HUGE)) nr_pmd_mappings++; + if (!check_huge_type(categories, type)) + goto out; } - close(pagemap_fd); - return nr_hpages == nr_pmd_mappings; + if (check_pmd_mapping && (nr_pmd_mappings != nr_hpages)) + goto out; + ret = true; + +out: + close(pagemap_fd); + close(kpageflags_fd); + return ret; } bool check_huge_anon(void *addr, size_t len, int nr_hpages, uint64_t hpage_size) { - uint64_t pmd_pagesize = read_pmd_pagesize(); - - if (!pmd_pagesize) - ksft_exit_fail_msg("reading PMD pagesize failed\n"); - - if (hpage_size == pmd_pagesize) - return __check_pmd_huge(addr, len, nr_hpages, hpage_size, - CHECK_HUGE_ANON); - - return check_large_folios(addr, len, nr_hpages, hpage_size); + return __check_huge(addr, len, nr_hpages, hpage_size, CHECK_HUGE_ANON); } bool check_huge_file(void *addr, size_t len, int nr_hpages, uint64_t hpage_size) { - uint64_t pmd_pagesize = read_pmd_pagesize(); - - if (!pmd_pagesize) - ksft_exit_fail_msg("reading PMD pagesize failed\n"); - - if (hpage_size == pmd_pagesize) - return __check_pmd_huge(addr, len, nr_hpages, hpage_size, - CHECK_HUGE_FILE); - - return check_large_folios(addr, len, nr_hpages, hpage_size); + return __check_huge(addr, len, nr_hpages, hpage_size, CHECK_HUGE_FILE); } bool check_huge_shmem(void *addr, size_t len, int nr_hpages, uint64_t hpage_size) _ Patches currently in -mm which might be from yeoreum.yun@arm.com are kselftest-mm-fix-potential-failure-for-merged-vma-in-guard-regions.patch kselftest-mm-remove-exclusion-of-building-soft-dirty-test-in-arm64.patch kselftest-mm-return-fail-when-child-test-result-is-fail-in-khugepaged.patch kselftest-mm-fix-intermittent-failure-khugepaged-test.patch kselftest-mm-remove-check_huge_shmem.patch