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authorSuren Baghdasaryan <surenb@google.com>2023-12-29 18:56:36 -0800
committerAndrew Morton <akpm@linux-foundation.org>2024-01-05 10:17:49 -0800
commita5b7620bab81f16e8bbb04f4aea94c4c7feb0d77 (patch)
treeac2cb7175e11913db48bc63c021b958f3795d7cd
parent8c9eea721a9837b227abcc9374862f4cefc71530 (diff)
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 <surenb@google.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Brian Geffon <bgeffon@google.com> Cc: Christian Brauner <brauner@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jann Horn <jannh@google.com> Cc: Kalesh Singh <kaleshsingh@google.com> Cc: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Nicolas Geoffray <ngeoffray@google.com> Cc: Peter Xu <peterx@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Shuah Khan <shuah@kernel.org> Cc: ZhangPeng <zhangpeng362@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-rw-r--r--tools/testing/selftests/mm/uffd-unit-tests.c17
1 files changed, 17 insertions, 0 deletions
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);
}
@@ -1331,6 +1341,13 @@ uffd_test_case_t uffd_tests[] = {
.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,
.mem_targets = MEM_ALL,