2024-03-21 23:20:39

by Edward Liaw

Subject: [PATCH v1] selftests/mm: sigbus-wp test requires UFFD_FEATURE_WP_HUGETLBFS_SHMEM

The sigbus-wp test requires the UFFD_FEATURE_WP_HUGETLBFS_SHMEM flag for
shmem and hugetlb targets. Otherwise it is not backwards compatible
with kernels <5.19 and fails with EINVAL.

Signed-off-by: Edward Liaw <[email protected]>
---
tools/testing/selftests/mm/uffd-unit-tests.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c
index 4a48dc617c6b..21ec23206ab4 100644
--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -1437,7 +1437,8 @@ uffd_test_case_t uffd_tests[] = {
.uffd_fn = uffd_sigbus_wp_test,
.mem_targets = MEM_ALL,
.uffd_feature_required = UFFD_FEATURE_SIGBUS |
- UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP,
+ UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP |
+ UFFD_FEATURE_WP_HUGETLBFS_SHMEM,
},
{
.name = "events",
--
2.44.0.396.g6e790dbe36-goog

2024-03-21 23:29:36

by Andrew Morton

Subject: Re: [PATCH v1] selftests/mm: sigbus-wp test requires UFFD_FEATURE_WP_HUGETLBFS_SHMEM

On Thu, 21 Mar 2024 23:20:21 +0000 Edward Liaw <[email protected]> wrote:

> The sigbus-wp test requires the UFFD_FEATURE_WP_HUGETLBFS_SHMEM flag for
> shmem and hugetlb targets. Otherwise it is not backwards compatible
> with kernels <5.19 and fails with EINVAL.
>
> ...
>
> --- a/tools/testing/selftests/mm/uffd-unit-tests.c
> +++ b/tools/testing/selftests/mm/uffd-unit-tests.c
> @@ -1437,7 +1437,8 @@ uffd_test_case_t uffd_tests[] = {
> .uffd_fn = uffd_sigbus_wp_test,
> .mem_targets = MEM_ALL,
> .uffd_feature_required = UFFD_FEATURE_SIGBUS |
> - UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP,
> + UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP |
> + UFFD_FEATURE_WP_HUGETLBFS_SHMEM,
> },
> {
> .name = "events",

Thanks, I'll add

Fixes: 73c1ea939b65 ("selftests/mm: move uffd sig/events tests into uffd unit tests")
Cc: <[email protected]>