From a5b7620bab81f16e8bbb04f4aea94c4c7feb0d77 Mon Sep 17 00:00:00 2001 From: Suren Baghdasaryan Date: Fri, 29 Dec 2023 18:56:36 -0800 Subject: selftests/mm: add separate UFFDIO_MOVE test for PMD splitting Add a test for UFFDIO_MOVE ioctl operating on a hugepage which has to be split because destination is marked with MADV_NOHUGEPAGE. With this we cover all 3 cases: normal page move, hugepage move, hugepage splitting before move. Link: https://lkml.kernel.org/r/20231230025636.2477429-1-surenb@google.com Signed-off-by: Suren Baghdasaryan Cc: Al Viro Cc: Andrea Arcangeli Cc: Axel Rasmussen Cc: Brian Geffon Cc: Christian Brauner Cc: David Hildenbrand Cc: Hugh Dickins Cc: Jann Horn Cc: Kalesh Singh Cc: Liam R. Howlett Cc: Lokesh Gidra Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport (IBM) Cc: Nicolas Geoffray Cc: Peter Xu Cc: Ryan Roberts Cc: Shuah Khan Cc: ZhangPeng Signed-off-by: Andrew Morton --- tools/testing/selftests/mm/uffd-unit-tests.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'tools/testing/selftests/mm/uffd-unit-tests.c') diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index d8091523c2df..cce90a10515a 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -1199,6 +1199,16 @@ static void uffd_move_test(uffd_test_args_t *targs) static void uffd_move_pmd_test(uffd_test_args_t *targs) { + if (madvise(area_dst, nr_pages * page_size, MADV_HUGEPAGE)) + err("madvise(MADV_HUGEPAGE) failure"); + uffd_move_test_common(targs, read_pmd_pagesize(), + uffd_move_pmd_handle_fault); +} + +static void uffd_move_pmd_split_test(uffd_test_args_t *targs) +{ + if (madvise(area_dst, nr_pages * page_size, MADV_NOHUGEPAGE)) + err("madvise(MADV_NOHUGEPAGE) failure"); uffd_move_test_common(targs, read_pmd_pagesize(), uffd_move_pmd_handle_fault); } @@ -1330,6 +1340,13 @@ uffd_test_case_t uffd_tests[] = { .uffd_feature_required = UFFD_FEATURE_MOVE, .test_case_ops = &uffd_move_test_pmd_case_ops, }, + { + .name = "move-pmd-split", + .uffd_fn = uffd_move_pmd_split_test, + .mem_targets = MEM_ANON, + .uffd_feature_required = UFFD_FEATURE_MOVE, + .test_case_ops = &uffd_move_test_pmd_case_ops, + }, { .name = "wp-fork", .uffd_fn = uffd_wp_fork_test, -- cgit v1.2.3