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.
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
---
Patch applies over mm-unstable.
tools/testing/selftests/mm/uffd-unit-tests.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
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,
--
2.34.1
